CVE-2022-50406 (GCVE-0-2022-50406)

Vulnerability from cvelistv5 – Published: 2025-09-18 16:03 – Updated: 2026-08-05 08:58
VLAI
Title
iomap: iomap: fix memory corruption when recording errors during writeback
Summary
In the Linux kernel, the following vulnerability has been resolved: iomap: iomap: fix memory corruption when recording errors during writeback Every now and then I see this crash on arm64: Unable to handle kernel NULL pointer dereference at virtual address 00000000000000f8 Buffer I/O error on dev dm-0, logical block 8733687, async page read Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 user pgtable: 64k pages, 42-bit VAs, pgdp=0000000139750000 [00000000000000f8] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000, pmd=0000000000000000 Internal error: Oops: 96000006 [#1] PREEMPT SMP Buffer I/O error on dev dm-0, logical block 8733688, async page read Dumping ftrace buffer: Buffer I/O error on dev dm-0, logical block 8733689, async page read (ftrace buffer empty) XFS (dm-0): log I/O error -5 Modules linked in: dm_thin_pool dm_persistent_data XFS (dm-0): Metadata I/O Error (0x1) detected at xfs_trans_read_buf_map+0x1ec/0x590 [xfs] (fs/xfs/xfs_trans_buf.c:296). dm_bio_prison XFS (dm-0): Please unmount the filesystem and rectify the problem(s) XFS (dm-0): xfs_imap_lookup: xfs_ialloc_read_agi() returned error -5, agno 0 dm_bufio dm_log_writes xfs nft_chain_nat xt_REDIRECT nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip6t_REJECT potentially unexpected fatal signal 6. nf_reject_ipv6 potentially unexpected fatal signal 6. ipt_REJECT nf_reject_ipv4 CPU: 1 PID: 122166 Comm: fsstress Tainted: G W 6.0.0-rc5-djwa #rc5 3004c9f1de887ebae86015f2677638ce51ee7 rpcsec_gss_krb5 auth_rpcgss xt_tcpudp ip_set_hash_ip ip_set_hash_net xt_set nft_compat ip_set_hash_mac ip_set nf_tables Hardware name: QEMU KVM Virtual Machine, BIOS 1.5.1 06/16/2021 pstate: 60001000 (nZCv daif -PAN -UAO -TCO -DIT +SSBS BTYPE=--) ip_tables pc : 000003fd6d7df200 x_tables lr : 000003fd6d7df1ec overlay nfsv4 CPU: 0 PID: 54031 Comm: u4:3 Tainted: G W 6.0.0-rc5-djwa #rc5 3004c9f1de887ebae86015f2677638ce51ee7405 Hardware name: QEMU KVM Virtual Machine, BIOS 1.5.1 06/16/2021 Workqueue: writeback wb_workfn sp : 000003ffd9522fd0 (flush-253:0) pstate: 60401005 (nZCv daif +PAN -UAO -TCO -DIT +SSBS BTYPE=--) pc : errseq_set+0x1c/0x100 x29: 000003ffd9522fd0 x28: 0000000000000023 x27: 000002acefeb6780 x26: 0000000000000005 x25: 0000000000000001 x24: 0000000000000000 x23: 00000000ffffffff x22: 0000000000000005 lr : __filemap_set_wb_err+0x24/0xe0 x21: 0000000000000006 sp : fffffe000f80f760 x29: fffffe000f80f760 x28: 0000000000000003 x27: fffffe000f80f9f8 x26: 0000000002523000 x25: 00000000fffffffb x24: fffffe000f80f868 x23: fffffe000f80fbb0 x22: fffffc0180c26a78 x21: 0000000002530000 x20: 0000000000000000 x19: 0000000000000000 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 x14: 0000000000000001 x13: 0000000000470af3 x12: fffffc0058f70000 x11: 0000000000000040 x10: 0000000000001b20 x9 : fffffe000836b288 x8 : fffffc00eb9fd480 x7 : 0000000000f83659 x6 : 0000000000000000 x5 : 0000000000000869 x4 : 0000000000000005 x3 : 00000000000000f8 x20: 000003fd6d740020 x19: 000000000001dd36 x18: 0000000000000001 x17: 000003fd6d78704c x16: 0000000000000001 x15: 000002acfac87668 x2 : 0000000000000ffa x1 : 00000000fffffffb x0 : 00000000000000f8 Call trace: errseq_set+0x1c/0x100 __filemap_set_wb_err+0x24/0xe0 iomap_do_writepage+0x5e4/0xd5c write_cache_pages+0x208/0x674 iomap_writepages+0x34/0x60 xfs_vm_writepages+0x8c/0xcc [xfs 7a861f39c43631f15d3a5884246ba5035d4ca78b] x14: 0000000000000000 x13: 2064656e72757465 x12: 0000000000002180 x11: 000003fd6d8a82d0 x10: 0000000000000000 x9 : 000003fd6d8ae288 x8 : 0000000000000083 x7 : 00000000ffffffff x6 : 00000000ffffffee x5 : 00000000fbad2887 x4 : 000003fd6d9abb58 x3 : 000003fd6d740020 x2 : 0000000000000006 x1 : 000000000001dd36 x0 : 0000000000000000 CPU: ---truncated---
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 150d5be09ce49a9bed6feb7b7dc4e5ae188778ec , < 82c66c46f73b88be74c869e2cbfef45281adf3c6 (git)
Affected: 150d5be09ce49a9bed6feb7b7dc4e5ae188778ec , < 7308591d9c7787aec58f6a01a7823f14e90db7a2 (git)
Affected: 150d5be09ce49a9bed6feb7b7dc4e5ae188778ec , < 3d5f3ba1ac28059bdf7000cae2403e4e984308d2 (git)
Create a notification for this product.
Linux Linux Affected: 4.6
Unaffected: 0 , < 4.6 (semver)
Unaffected: 5.19.17 , ≤ 5.19.* (semver)
Unaffected: 6.0.3 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2022-50406",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-14T19:07:48.115623Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-787",
                "description": "CWE-787 Out-of-bounds Write",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:13:08.377Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/iomap/buffered-io.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "82c66c46f73b88be74c869e2cbfef45281adf3c6",
              "status": "affected",
              "version": "150d5be09ce49a9bed6feb7b7dc4e5ae188778ec",
              "versionType": "git"
            },
            {
              "lessThan": "7308591d9c7787aec58f6a01a7823f14e90db7a2",
              "status": "affected",
              "version": "150d5be09ce49a9bed6feb7b7dc4e5ae188778ec",
              "versionType": "git"
            },
            {
              "lessThan": "3d5f3ba1ac28059bdf7000cae2403e4e984308d2",
              "status": "affected",
              "version": "150d5be09ce49a9bed6feb7b7dc4e5ae188778ec",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/iomap/buffered-io.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.6"
            },
            {
              "lessThan": "4.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.17",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19.17",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.3",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niomap: iomap: fix memory corruption when recording errors during writeback\n\nEvery now and then I see this crash on arm64:\n\nUnable to handle kernel NULL pointer dereference at virtual address 00000000000000f8\nBuffer I/O error on dev dm-0, logical block 8733687, async page read\nMem abort info:\n  ESR = 0x0000000096000006\n  EC = 0x25: DABT (current EL), IL = 32 bits\n  SET = 0, FnV = 0\n  EA = 0, S1PTW = 0\n  FSC = 0x06: level 2 translation fault\nData abort info:\n  ISV = 0, ISS = 0x00000006\n  CM = 0, WnR = 0\nuser pgtable: 64k pages, 42-bit VAs, pgdp=0000000139750000\n[00000000000000f8] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000, pmd=0000000000000000\nInternal error: Oops: 96000006 [#1] PREEMPT SMP\nBuffer I/O error on dev dm-0, logical block 8733688, async page read\nDumping ftrace buffer:\nBuffer I/O error on dev dm-0, logical block 8733689, async page read\n   (ftrace buffer empty)\nXFS (dm-0): log I/O error -5\nModules linked in: dm_thin_pool dm_persistent_data\nXFS (dm-0): Metadata I/O Error (0x1) detected at xfs_trans_read_buf_map+0x1ec/0x590 [xfs] (fs/xfs/xfs_trans_buf.c:296).\n dm_bio_prison\nXFS (dm-0): Please unmount the filesystem and rectify the problem(s)\nXFS (dm-0): xfs_imap_lookup: xfs_ialloc_read_agi() returned error -5, agno 0\n dm_bufio dm_log_writes xfs nft_chain_nat xt_REDIRECT nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip6t_REJECT\npotentially unexpected fatal signal 6.\n nf_reject_ipv6\npotentially unexpected fatal signal 6.\n ipt_REJECT nf_reject_ipv4\nCPU: 1 PID: 122166 Comm: fsstress Tainted: G        W          6.0.0-rc5-djwa #rc5 3004c9f1de887ebae86015f2677638ce51ee7\n rpcsec_gss_krb5 auth_rpcgss xt_tcpudp ip_set_hash_ip ip_set_hash_net xt_set nft_compat ip_set_hash_mac ip_set nf_tables\nHardware name: QEMU KVM Virtual Machine, BIOS 1.5.1 06/16/2021\npstate: 60001000 (nZCv daif -PAN -UAO -TCO -DIT +SSBS BTYPE=--)\n ip_tables\npc : 000003fd6d7df200\n x_tables\nlr : 000003fd6d7df1ec\n overlay nfsv4\nCPU: 0 PID: 54031 Comm: u4:3 Tainted: G        W          6.0.0-rc5-djwa #rc5 3004c9f1de887ebae86015f2677638ce51ee7405\nHardware name: QEMU KVM Virtual Machine, BIOS 1.5.1 06/16/2021\nWorkqueue: writeback wb_workfn\nsp : 000003ffd9522fd0\n (flush-253:0)\npstate: 60401005 (nZCv daif +PAN -UAO -TCO -DIT +SSBS BTYPE=--)\npc : errseq_set+0x1c/0x100\nx29: 000003ffd9522fd0 x28: 0000000000000023 x27: 000002acefeb6780\nx26: 0000000000000005 x25: 0000000000000001 x24: 0000000000000000\nx23: 00000000ffffffff x22: 0000000000000005\nlr : __filemap_set_wb_err+0x24/0xe0\n x21: 0000000000000006\nsp : fffffe000f80f760\nx29: fffffe000f80f760 x28: 0000000000000003 x27: fffffe000f80f9f8\nx26: 0000000002523000 x25: 00000000fffffffb x24: fffffe000f80f868\nx23: fffffe000f80fbb0 x22: fffffc0180c26a78 x21: 0000000002530000\nx20: 0000000000000000 x19: 0000000000000000 x18: 0000000000000000\n\nx17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000\nx14: 0000000000000001 x13: 0000000000470af3 x12: fffffc0058f70000\nx11: 0000000000000040 x10: 0000000000001b20 x9 : fffffe000836b288\nx8 : fffffc00eb9fd480 x7 : 0000000000f83659 x6 : 0000000000000000\nx5 : 0000000000000869 x4 : 0000000000000005 x3 : 00000000000000f8\nx20: 000003fd6d740020 x19: 000000000001dd36 x18: 0000000000000001\nx17: 000003fd6d78704c x16: 0000000000000001 x15: 000002acfac87668\nx2 : 0000000000000ffa x1 : 00000000fffffffb x0 : 00000000000000f8\nCall trace:\n errseq_set+0x1c/0x100\n __filemap_set_wb_err+0x24/0xe0\n iomap_do_writepage+0x5e4/0xd5c\n write_cache_pages+0x208/0x674\n iomap_writepages+0x34/0x60\n xfs_vm_writepages+0x8c/0xcc [xfs 7a861f39c43631f15d3a5884246ba5035d4ca78b]\nx14: 0000000000000000 x13: 2064656e72757465 x12: 0000000000002180\nx11: 000003fd6d8a82d0 x10: 0000000000000000 x9 : 000003fd6d8ae288\nx8 : 0000000000000083 x7 : 00000000ffffffff x6 : 00000000ffffffee\nx5 : 00000000fbad2887 x4 : 000003fd6d9abb58 x3 : 000003fd6d740020\nx2 : 0000000000000006 x1 : 000000000001dd36 x0 : 0000000000000000\nCPU: \n---truncated---"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable path is iomap writeback (iomap_writepages \u2192 iomap_do_writepage \u2192 iomap_writepage_map) for local filesystems using iomap (XFS, GFS2, zonefs), reached by dirtying and syncing a local file. It is not in a network protocol parser; remote services only hit it indirectly via local FS writeback.\nAC:L - An unprivileged attacker can induce map_blocks failures (e.g. ENOSPC on XFS delalloc conversion) and control both sides of the race by syncing/writeback on one thread while truncating or invalidating the same file on another, so success does not depend on conditions outside their influence.\nPR:L - Any unprivileged user who can write files on an iomap-backed filesystem (commonly XFS on servers/cloud images) can dirty pages, force writeback errors, and race truncate/invalidate; no init-namespace root or capabilities are required.\nUI:N - The attacker creates, writes, syncs, and truncates their own files on an already-mounted filesystem; no separate victim action such as mounting a volume or opening a crafted file is required.\nS:U - Impact is host-kernel memory corruption / oops within the same OS security authority, enabling local privilege escalation or DoS, not a VM escape, IOMMU bypass, or other cross-boundary compromise.\nC:H - After unlock, folio-\u003emapping may be cleared or the folio reused; mapping_set_error then operates on a stale mapping pointer (author: memory corruption / wrong-file error), which is UAF-style corruption that can be leveraged for kernel information disclosure.\nI:H - mapping_set_error performs kernel writes (errseq_set on wb_err/s_wb_err and set_bit on mapping flags) through folio-\u003emapping after it may point at reused or unrelated memory, yielding a write/corruption primitive consistent with integrity High.\nA:H - The demonstrated failure is a kernel NULL pointer dereference in errseq_set during writeback (wb_workfn), causing oops/panic, and any folio mapping UAF remains crashable even without a full exploit."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:58:37.126Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/82c66c46f73b88be74c869e2cbfef45281adf3c6"
        },
        {
          "url": "https://git.kernel.org/stable/c/7308591d9c7787aec58f6a01a7823f14e90db7a2"
        },
        {
          "url": "https://git.kernel.org/stable/c/3d5f3ba1ac28059bdf7000cae2403e4e984308d2"
        }
      ],
      "title": "iomap: iomap: fix memory corruption when recording errors during writeback",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50406",
    "datePublished": "2025-09-18T16:03:51.155Z",
    "dateReserved": "2025-09-17T14:53:07.001Z",
    "dateUpdated": "2026-08-05T08:58:37.126Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2022-50406",
      "date": "2026-08-06",
      "epss": "0.00152",
      "percentile": "0.04902"
    },
    "microsoft_vex": {
      "current_release_date": "2025-12-16T01:36:42.000Z",
      "cve": "CVE-2022-50406",
      "id": "msrc_CVE-2022-50406",
      "initial_release_date": "2025-09-02T00:00:00.000Z",
      "product_status:known_not_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "iomap: iomap: fix memory corruption when recording errors during writeback",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2022-50406.json",
      "version": "2"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50406\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-18T16:15:43.760\",\"lastModified\":\"2026-06-17T05:23:28.460\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\niomap: iomap: fix memory corruption when recording errors during writeback\\n\\nEvery now and then I see this crash on arm64:\\n\\nUnable to handle kernel NULL pointer dereference at virtual address 00000000000000f8\\nBuffer I/O error on dev dm-0, logical block 8733687, async page read\\nMem abort info:\\n  ESR = 0x0000000096000006\\n  EC = 0x25: DABT (current EL), IL = 32 bits\\n  SET = 0, FnV = 0\\n  EA = 0, S1PTW = 0\\n  FSC = 0x06: level 2 translation fault\\nData abort info:\\n  ISV = 0, ISS = 0x00000006\\n  CM = 0, WnR = 0\\nuser pgtable: 64k pages, 42-bit VAs, pgdp=0000000139750000\\n[00000000000000f8] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000, pmd=0000000000000000\\nInternal error: Oops: 96000006 [#1] PREEMPT SMP\\nBuffer I/O error on dev dm-0, logical block 8733688, async page read\\nDumping ftrace buffer:\\nBuffer I/O error on dev dm-0, logical block 8733689, async page read\\n   (ftrace buffer empty)\\nXFS (dm-0): log I/O error -5\\nModules linked in: dm_thin_pool dm_persistent_data\\nXFS (dm-0): Metadata I/O Error (0x1) detected at xfs_trans_read_buf_map+0x1ec/0x590 [xfs] (fs/xfs/xfs_trans_buf.c:296).\\n dm_bio_prison\\nXFS (dm-0): Please unmount the filesystem and rectify the problem(s)\\nXFS (dm-0): xfs_imap_lookup: xfs_ialloc_read_agi() returned error -5, agno 0\\n dm_bufio dm_log_writes xfs nft_chain_nat xt_REDIRECT nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip6t_REJECT\\npotentially unexpected fatal signal 6.\\n nf_reject_ipv6\\npotentially unexpected fatal signal 6.\\n ipt_REJECT nf_reject_ipv4\\nCPU: 1 PID: 122166 Comm: fsstress Tainted: G        W          6.0.0-rc5-djwa #rc5 3004c9f1de887ebae86015f2677638ce51ee7\\n rpcsec_gss_krb5 auth_rpcgss xt_tcpudp ip_set_hash_ip ip_set_hash_net xt_set nft_compat ip_set_hash_mac ip_set nf_tables\\nHardware name: QEMU KVM Virtual Machine, BIOS 1.5.1 06/16/2021\\npstate: 60001000 (nZCv daif -PAN -UAO -TCO -DIT +SSBS BTYPE=--)\\n ip_tables\\npc : 000003fd6d7df200\\n x_tables\\nlr : 000003fd6d7df1ec\\n overlay nfsv4\\nCPU: 0 PID: 54031 Comm: u4:3 Tainted: G        W          6.0.0-rc5-djwa #rc5 3004c9f1de887ebae86015f2677638ce51ee7405\\nHardware name: QEMU KVM Virtual Machine, BIOS 1.5.1 06/16/2021\\nWorkqueue: writeback wb_workfn\\nsp : 000003ffd9522fd0\\n (flush-253:0)\\npstate: 60401005 (nZCv daif +PAN -UAO -TCO -DIT +SSBS BTYPE=--)\\npc : errseq_set+0x1c/0x100\\nx29: 000003ffd9522fd0 x28: 0000000000000023 x27: 000002acefeb6780\\nx26: 0000000000000005 x25: 0000000000000001 x24: 0000000000000000\\nx23: 00000000ffffffff x22: 0000000000000005\\nlr : __filemap_set_wb_err+0x24/0xe0\\n x21: 0000000000000006\\nsp : fffffe000f80f760\\nx29: fffffe000f80f760 x28: 0000000000000003 x27: fffffe000f80f9f8\\nx26: 0000000002523000 x25: 00000000fffffffb x24: fffffe000f80f868\\nx23: fffffe000f80fbb0 x22: fffffc0180c26a78 x21: 0000000002530000\\nx20: 0000000000000000 x19: 0000000000000000 x18: 0000000000000000\\n\\nx17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000\\nx14: 0000000000000001 x13: 0000000000470af3 x12: fffffc0058f70000\\nx11: 0000000000000040 x10: 0000000000001b20 x9 : fffffe000836b288\\nx8 : fffffc00eb9fd480 x7 : 0000000000f83659 x6 : 0000000000000000\\nx5 : 0000000000000869 x4 : 0000000000000005 x3 : 00000000000000f8\\nx20: 000003fd6d740020 x19: 000000000001dd36 x18: 0000000000000001\\nx17: 000003fd6d78704c x16: 0000000000000001 x15: 000002acfac87668\\nx2 : 0000000000000ffa x1 : 00000000fffffffb x0 : 00000000000000f8\\nCall trace:\\n errseq_set+0x1c/0x100\\n __filemap_set_wb_err+0x24/0xe0\\n iomap_do_writepage+0x5e4/0xd5c\\n write_cache_pages+0x208/0x674\\n iomap_writepages+0x34/0x60\\n xfs_vm_writepages+0x8c/0xcc [xfs 7a861f39c43631f15d3a5884246ba5035d4ca78b]\\nx14: 0000000000000000 x13: 2064656e72757465 x12: 0000000000002180\\nx11: 000003fd6d8a82d0 x10: 0000000000000000 x9 : 000003fd6d8ae288\\nx8 : 0000000000000083 x7 : 00000000ffffffff x6 : 00000000ffffffee\\nx5 : 00000000fbad2887 x4 : 000003fd6d9abb58 x3 : 000003fd6d740020\\nx2 : 0000000000000006 x1 : 000000000001dd36 x0 : 0000000000000000\\nCPU: \\n---truncated---\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/iomap/buffered-io.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"150d5be09ce49a9bed6feb7b7dc4e5ae188778ec\",\"lessThan\":\"82c66c46f73b88be74c869e2cbfef45281adf3c6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"150d5be09ce49a9bed6feb7b7dc4e5ae188778ec\",\"lessThan\":\"7308591d9c7787aec58f6a01a7823f14e90db7a2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"150d5be09ce49a9bed6feb7b7dc4e5ae188778ec\",\"lessThan\":\"3d5f3ba1ac28059bdf7000cae2403e4e984308d2\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/iomap/buffered-io.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.6\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.6\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.19.17\",\"lessThanOrEqual\":\"5.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.0.3\",\"lessThanOrEqual\":\"6.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-01-14T19:07:48.115623Z\",\"id\":\"CVE-2022-50406\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-787\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-787\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.6\",\"versionEndExcluding\":\"5.19.17\",\"matchCriteriaId\":\"9EA06985-8F7B-4EC7-A6B8-B8597C9FA77B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.0\",\"versionEndExcluding\":\"6.0.3\",\"matchCriteriaId\":\"5BCD8201-B847-4442-B894-70D430128DEF\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3d5f3ba1ac28059bdf7000cae2403e4e984308d2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7308591d9c7787aec58f6a01a7823f14e90db7a2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/82c66c46f73b88be74c869e2cbfef45281adf3c6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-21T18:46:09+00:00",
      "cve": "CVE-2022-50406",
      "id": "CVE-2022-50406",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "883",
      "product_status:known_affected": "124",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: iomap: iomap: fix memory corruption when recording errors during writeback",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50406.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2022-50406\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-14T19:07:48.115623Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-787\", \"description\": \"CWE-787 Out-of-bounds Write\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-14T19:07:42.416Z\"}}], \"cna\": {\"title\": \"iomap: iomap: fix memory corruption when recording errors during writeback\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.8, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:L - The vulnerable path is iomap writeback (iomap_writepages \\u2192 iomap_do_writepage \\u2192 iomap_writepage_map) for local filesystems using iomap (XFS, GFS2, zonefs), reached by dirtying and syncing a local file. It is not in a network protocol parser; remote services only hit it indirectly via local FS writeback.\\nAC:L - An unprivileged attacker can induce map_blocks failures (e.g. ENOSPC on XFS delalloc conversion) and control both sides of the race by syncing/writeback on one thread while truncating or invalidating the same file on another, so success does not depend on conditions outside their influence.\\nPR:L - Any unprivileged user who can write files on an iomap-backed filesystem (commonly XFS on servers/cloud images) can dirty pages, force writeback errors, and race truncate/invalidate; no init-namespace root or capabilities are required.\\nUI:N - The attacker creates, writes, syncs, and truncates their own files on an already-mounted filesystem; no separate victim action such as mounting a volume or opening a crafted file is required.\\nS:U - Impact is host-kernel memory corruption / oops within the same OS security authority, enabling local privilege escalation or DoS, not a VM escape, IOMMU bypass, or other cross-boundary compromise.\\nC:H - After unlock, folio-\u003emapping may be cleared or the folio reused; mapping_set_error then operates on a stale mapping pointer (author: memory corruption / wrong-file error), which is UAF-style corruption that can be leveraged for kernel information disclosure.\\nI:H - mapping_set_error performs kernel writes (errseq_set on wb_err/s_wb_err and set_bit on mapping flags) through folio-\u003emapping after it may point at reused or unrelated memory, yielding a write/corruption primitive consistent with integrity High.\\nA:H - The demonstrated failure is a kernel NULL pointer dereference in errseq_set during writeback (wb_workfn), causing oops/panic, and any folio mapping UAF remains crashable even without a full exploit.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"150d5be09ce49a9bed6feb7b7dc4e5ae188778ec\", \"lessThan\": \"82c66c46f73b88be74c869e2cbfef45281adf3c6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"150d5be09ce49a9bed6feb7b7dc4e5ae188778ec\", \"lessThan\": \"7308591d9c7787aec58f6a01a7823f14e90db7a2\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"150d5be09ce49a9bed6feb7b7dc4e5ae188778ec\", \"lessThan\": \"3d5f3ba1ac28059bdf7000cae2403e4e984308d2\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/iomap/buffered-io.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.6\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.6\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.19.17\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.19.*\"}, {\"status\": \"unaffected\", \"version\": \"6.0.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.0.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/iomap/buffered-io.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/82c66c46f73b88be74c869e2cbfef45281adf3c6\"}, {\"url\": \"https://git.kernel.org/stable/c/7308591d9c7787aec58f6a01a7823f14e90db7a2\"}, {\"url\": \"https://git.kernel.org/stable/c/3d5f3ba1ac28059bdf7000cae2403e4e984308d2\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\niomap: iomap: fix memory corruption when recording errors during writeback\\n\\nEvery now and then I see this crash on arm64:\\n\\nUnable to handle kernel NULL pointer dereference at virtual address 00000000000000f8\\nBuffer I/O error on dev dm-0, logical block 8733687, async page read\\nMem abort info:\\n  ESR = 0x0000000096000006\\n  EC = 0x25: DABT (current EL), IL = 32 bits\\n  SET = 0, FnV = 0\\n  EA = 0, S1PTW = 0\\n  FSC = 0x06: level 2 translation fault\\nData abort info:\\n  ISV = 0, ISS = 0x00000006\\n  CM = 0, WnR = 0\\nuser pgtable: 64k pages, 42-bit VAs, pgdp=0000000139750000\\n[00000000000000f8] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000, pmd=0000000000000000\\nInternal error: Oops: 96000006 [#1] PREEMPT SMP\\nBuffer I/O error on dev dm-0, logical block 8733688, async page read\\nDumping ftrace buffer:\\nBuffer I/O error on dev dm-0, logical block 8733689, async page read\\n   (ftrace buffer empty)\\nXFS (dm-0): log I/O error -5\\nModules linked in: dm_thin_pool dm_persistent_data\\nXFS (dm-0): Metadata I/O Error (0x1) detected at xfs_trans_read_buf_map+0x1ec/0x590 [xfs] (fs/xfs/xfs_trans_buf.c:296).\\n dm_bio_prison\\nXFS (dm-0): Please unmount the filesystem and rectify the problem(s)\\nXFS (dm-0): xfs_imap_lookup: xfs_ialloc_read_agi() returned error -5, agno 0\\n dm_bufio dm_log_writes xfs nft_chain_nat xt_REDIRECT nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip6t_REJECT\\npotentially unexpected fatal signal 6.\\n nf_reject_ipv6\\npotentially unexpected fatal signal 6.\\n ipt_REJECT nf_reject_ipv4\\nCPU: 1 PID: 122166 Comm: fsstress Tainted: G        W          6.0.0-rc5-djwa #rc5 3004c9f1de887ebae86015f2677638ce51ee7\\n rpcsec_gss_krb5 auth_rpcgss xt_tcpudp ip_set_hash_ip ip_set_hash_net xt_set nft_compat ip_set_hash_mac ip_set nf_tables\\nHardware name: QEMU KVM Virtual Machine, BIOS 1.5.1 06/16/2021\\npstate: 60001000 (nZCv daif -PAN -UAO -TCO -DIT +SSBS BTYPE=--)\\n ip_tables\\npc : 000003fd6d7df200\\n x_tables\\nlr : 000003fd6d7df1ec\\n overlay nfsv4\\nCPU: 0 PID: 54031 Comm: u4:3 Tainted: G        W          6.0.0-rc5-djwa #rc5 3004c9f1de887ebae86015f2677638ce51ee7405\\nHardware name: QEMU KVM Virtual Machine, BIOS 1.5.1 06/16/2021\\nWorkqueue: writeback wb_workfn\\nsp : 000003ffd9522fd0\\n (flush-253:0)\\npstate: 60401005 (nZCv daif +PAN -UAO -TCO -DIT +SSBS BTYPE=--)\\npc : errseq_set+0x1c/0x100\\nx29: 000003ffd9522fd0 x28: 0000000000000023 x27: 000002acefeb6780\\nx26: 0000000000000005 x25: 0000000000000001 x24: 0000000000000000\\nx23: 00000000ffffffff x22: 0000000000000005\\nlr : __filemap_set_wb_err+0x24/0xe0\\n x21: 0000000000000006\\nsp : fffffe000f80f760\\nx29: fffffe000f80f760 x28: 0000000000000003 x27: fffffe000f80f9f8\\nx26: 0000000002523000 x25: 00000000fffffffb x24: fffffe000f80f868\\nx23: fffffe000f80fbb0 x22: fffffc0180c26a78 x21: 0000000002530000\\nx20: 0000000000000000 x19: 0000000000000000 x18: 0000000000000000\\n\\nx17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000\\nx14: 0000000000000001 x13: 0000000000470af3 x12: fffffc0058f70000\\nx11: 0000000000000040 x10: 0000000000001b20 x9 : fffffe000836b288\\nx8 : fffffc00eb9fd480 x7 : 0000000000f83659 x6 : 0000000000000000\\nx5 : 0000000000000869 x4 : 0000000000000005 x3 : 00000000000000f8\\nx20: 000003fd6d740020 x19: 000000000001dd36 x18: 0000000000000001\\nx17: 000003fd6d78704c x16: 0000000000000001 x15: 000002acfac87668\\nx2 : 0000000000000ffa x1 : 00000000fffffffb x0 : 00000000000000f8\\nCall trace:\\n errseq_set+0x1c/0x100\\n __filemap_set_wb_err+0x24/0xe0\\n iomap_do_writepage+0x5e4/0xd5c\\n write_cache_pages+0x208/0x674\\n iomap_writepages+0x34/0x60\\n xfs_vm_writepages+0x8c/0xcc [xfs 7a861f39c43631f15d3a5884246ba5035d4ca78b]\\nx14: 0000000000000000 x13: 2064656e72757465 x12: 0000000000002180\\nx11: 000003fd6d8a82d0 x10: 0000000000000000 x9 : 000003fd6d8ae288\\nx8 : 0000000000000083 x7 : 00000000ffffffff x6 : 00000000ffffffee\\nx5 : 00000000fbad2887 x4 : 000003fd6d9abb58 x3 : 000003fd6d740020\\nx2 : 0000000000000006 x1 : 000000000001dd36 x0 : 0000000000000000\\nCPU: \\n---truncated---\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.19.17\", \"versionStartIncluding\": \"4.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.0.3\", \"versionStartIncluding\": \"4.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1\", \"versionStartIncluding\": \"4.6\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T08:58:37.126Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-50406\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T08:58:37.126Z\", \"dateReserved\": \"2025-09-17T14:53:07.001Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-09-18T16:03:51.155Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.