Vulnerability-Lookup

OESA-2026-4436 (CVE-2026-68278)

Vulnerability from osv_openeuler – Published: 2026-10-22 14:35 – Updated: 2026-10-22 14:35 – Source website

Summary

kernel security update

Details

The Linux Kernel, the operating system core itself.

Security Fix(es):

In the Linux kernel, the following vulnerability has been resolved:

drm/dp/mst: fix buffer overflows in sideband chunk accumulation

drm_dp_sideband_append_payload() has three related bugs when processing device-provided sideband reply data:

Zero-length curchunk_len underflow: msg_len is a 6-bit field taken directly from the DP sideband header. If a device sends msg_len=0, curchunk_len is set to zero. The condition (curchunk_idx >= curchunk_len) is immediately true, and curchunk_len-1 wraps to 255 (u8 underflow). drm_dp_msg_data_crc4() reads 255 bytes from chunk[48], then memcpy() writes 255 bytes into msg[], both far out of bounds.
chunk[48] overflow: curchunk_len can reach 63 (6-bit field). chunk[] is only 48 bytes. Multi-iteration payload assembly appends 16-byte blocks until curchunk_idx reaches curchunk_len, writing up to 15 bytes past the end of chunk[] into msg[].
msg[256] overflow: each chunk contributes (curchunk_len-1) bytes to msg[]. No check ensures curlen + (curchunk_len-1) stays within msg[256], so the memcpy can spill into adjacent struct fields.

All three are reachable from any DP MST device that can forge sideband reply messages on a physical connection.(CVE-2026-68278)

In the Linux kernel, the following vulnerability has been resolved:

fuse: fix invalidate lock leak on open O_TRUNC DAX failure

fuse_open() takes filemap_invalidate_lock() for a DAX truncate (dax_truncate = true) and releases it before the out_inode_unlock label. But when fuse_dax_break_layouts() fails, the goto out_inode_unlock skips the unlock and leaks the rwsem, so any later fault or truncate on the file stalls on the stale lock.

fuse_dax_break_layouts() can fail with -ERESTARTSYS when a signal interrupts the wait for busy DAX pages to drain:

open("file", O_RDWR | O_TRUNC) └─ fuse_open() ├─ filemap_invalidate_lock() # dax_truncate └─ fuse_dax_break_layouts() └─ dax_break_layout() └─ wait_page_idle() # TASK_INTERRUPTIBLE └─ fuse_wait_dax_page() # unlock, schedule, re-lock └─ signal → -ERESTARTSYS goto out_inode_unlock # <- lock leaked

Fix this by moving filemap_invalidate_unlock() below the label so that all error paths release the lock, and rename the label to out_unlock as it now covers more than just the inode lock.(CVE-2026-80855)

Severity

4.7 (Medium)


                    
                      CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-68278	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-80855	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "bpftool-5.10.0-338.0.0.239.oe2203sp4.aarch64.rpm",
          "bpftool-debuginfo-5.10.0-338.0.0.239.oe2203sp4.aarch64.rpm",
          "kernel-5.10.0-338.0.0.239.oe2203sp4.aarch64.rpm",
          "kernel-debuginfo-5.10.0-338.0.0.239.oe2203sp4.aarch64.rpm",
          "kernel-debugsource-5.10.0-338.0.0.239.oe2203sp4.aarch64.rpm",
          "kernel-devel-5.10.0-338.0.0.239.oe2203sp4.aarch64.rpm",
          "kernel-headers-5.10.0-338.0.0.239.oe2203sp4.aarch64.rpm",
          "kernel-source-5.10.0-338.0.0.239.oe2203sp4.aarch64.rpm",
          "kernel-tools-5.10.0-338.0.0.239.oe2203sp4.aarch64.rpm",
          "kernel-tools-debuginfo-5.10.0-338.0.0.239.oe2203sp4.aarch64.rpm",
          "kernel-tools-devel-5.10.0-338.0.0.239.oe2203sp4.aarch64.rpm",
          "perf-5.10.0-338.0.0.239.oe2203sp4.aarch64.rpm",
          "perf-debuginfo-5.10.0-338.0.0.239.oe2203sp4.aarch64.rpm",
          "python3-perf-5.10.0-338.0.0.239.oe2203sp4.aarch64.rpm",
          "python3-perf-debuginfo-5.10.0-338.0.0.239.oe2203sp4.aarch64.rpm"
        ],
        "src": [
          "kernel-5.10.0-338.0.0.239.oe2203sp4.src.rpm"
        ],
        "x86_64": [
          "bpftool-5.10.0-338.0.0.239.oe2203sp4.x86_64.rpm",
          "bpftool-debuginfo-5.10.0-338.0.0.239.oe2203sp4.x86_64.rpm",
          "kernel-5.10.0-338.0.0.239.oe2203sp4.x86_64.rpm",
          "kernel-debuginfo-5.10.0-338.0.0.239.oe2203sp4.x86_64.rpm",
          "kernel-debugsource-5.10.0-338.0.0.239.oe2203sp4.x86_64.rpm",
          "kernel-devel-5.10.0-338.0.0.239.oe2203sp4.x86_64.rpm",
          "kernel-headers-5.10.0-338.0.0.239.oe2203sp4.x86_64.rpm",
          "kernel-source-5.10.0-338.0.0.239.oe2203sp4.x86_64.rpm",
          "kernel-tools-5.10.0-338.0.0.239.oe2203sp4.x86_64.rpm",
          "kernel-tools-debuginfo-5.10.0-338.0.0.239.oe2203sp4.x86_64.rpm",
          "kernel-tools-devel-5.10.0-338.0.0.239.oe2203sp4.x86_64.rpm",
          "perf-5.10.0-338.0.0.239.oe2203sp4.x86_64.rpm",
          "perf-debuginfo-5.10.0-338.0.0.239.oe2203sp4.x86_64.rpm",
          "python3-perf-5.10.0-338.0.0.239.oe2203sp4.x86_64.rpm",
          "python3-perf-debuginfo-5.10.0-338.0.0.239.oe2203sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP4",
        "name": "kernel",
        "purl": "pkg:rpm/openEuler/kernel\u0026distro=openEuler-22.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.10.0-338.0.0.239.oe2203sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "The Linux Kernel, the operating system core itself.\r\n\r\nSecurity Fix(es):\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndrm/dp/mst: fix buffer overflows in sideband chunk accumulation\n\ndrm_dp_sideband_append_payload() has three related bugs when processing\ndevice-provided sideband reply data:\n\n1. Zero-length curchunk_len underflow: msg_len is a 6-bit field taken\n   directly from the DP sideband header. If a device sends msg_len=0,\n   curchunk_len is set to zero. The condition (curchunk_idx \u0026gt;= curchunk_len)\n   is immediately true, and curchunk_len-1 wraps to 255 (u8 underflow).\n   drm_dp_msg_data_crc4() reads 255 bytes from chunk[48], then memcpy()\n   writes 255 bytes into msg[], both far out of bounds.\n\n2. chunk[48] overflow: curchunk_len can reach 63 (6-bit field). chunk[] is\n   only 48 bytes. Multi-iteration payload assembly appends 16-byte blocks\n   until curchunk_idx reaches curchunk_len, writing up to 15 bytes past\n   the end of chunk[] into msg[].\n\n3. msg[256] overflow: each chunk contributes (curchunk_len-1) bytes to\n   msg[]. No check ensures curlen + (curchunk_len-1) stays within msg[256],\n   so the memcpy can spill into adjacent struct fields.\n\nAll three are reachable from any DP MST device that can forge sideband\nreply messages on a physical connection.(CVE-2026-68278)\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nfuse: fix invalidate lock leak on open O_TRUNC DAX failure\n\nfuse_open() takes filemap_invalidate_lock() for a DAX truncate\n(dax_truncate = true) and releases it before the out_inode_unlock\nlabel.  But when fuse_dax_break_layouts() fails, the goto\nout_inode_unlock skips the unlock and leaks the rwsem, so any later\nfault or truncate on the file stalls on the stale lock.\n\nfuse_dax_break_layouts() can fail with -ERESTARTSYS when a signal\ninterrupts the wait for busy DAX pages to drain:\n\n  open(\u0026quot;file\u0026quot;, O_RDWR | O_TRUNC)\n  \u2514\u2500 fuse_open()\n     \u251c\u2500 filemap_invalidate_lock()        # dax_truncate\n     \u2514\u2500 fuse_dax_break_layouts()\n        \u2514\u2500 dax_break_layout()\n           \u2514\u2500 wait_page_idle()           # TASK_INTERRUPTIBLE\n              \u2514\u2500 fuse_wait_dax_page()    # unlock, schedule, re-lock\n                 \u2514\u2500 signal \u2192 -ERESTARTSYS\n     goto out_inode_unlock               # \u0026lt;- lock leaked\n\nFix this by moving filemap_invalidate_unlock() below the label so\nthat all error paths release the lock, and rename the label to\nout_unlock as it now covers more than just the inode lock.(CVE-2026-80855)",
  "id": "OESA-2026-4436",
  "modified": "2026-10-22T14:35:07Z",
  "published": "2026-10-22T14:35:07Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4436"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68278"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80855"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "kernel security update",
  "upstream": [
    "CVE-2026-68278",
    "CVE-2026-80855"
  ]
}

CVE-2026-68278 (GCVE-0-2026-68278)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:01 – Updated: 2026-08-23 12:46

Title

drm/dp/mst: fix buffer overflows in sideband chunk accumulation

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/dp/mst: fix buffer overflows in sideband chunk accumulation drm_dp_sideband_append_payload() has three related bugs when processing device-provided sideband reply data: 1. Zero-length curchunk_len underflow: msg_len is a 6-bit field taken directly from the DP sideband header. If a device sends msg_len=0, curchunk_len is set to zero. The condition (curchunk_idx >= curchunk_len) is immediately true, and curchunk_len-1 wraps to 255 (u8 underflow). drm_dp_msg_data_crc4() reads 255 bytes from chunk[48], then memcpy() writes 255 bytes into msg[], both far out of bounds. 2. chunk[48] overflow: curchunk_len can reach 63 (6-bit field). chunk[] is only 48 bytes. Multi-iteration payload assembly appends 16-byte blocks until curchunk_idx reaches curchunk_len, writing up to 15 bytes past the end of chunk[] into msg[]. 3. msg[256] overflow: each chunk contributes (curchunk_len-1) bytes to msg[]. No check ensures curlen + (curchunk_len-1) stays within msg[256], so the memcpy can spill into adjacent struct fields. All three are reachable from any DP MST device that can forge sideband reply messages on a physical connection.

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7018 records in the last 180 days details

References

8 references

URL	Tags
https://git.kernel.org/stable/c/ef2ecb6cf268debf3…
https://git.kernel.org/stable/c/d4e05dedb252ed3e5…
https://git.kernel.org/stable/c/4d5109075a787de28…
https://git.kernel.org/stable/c/53937a2787d29c7a4…
https://git.kernel.org/stable/c/ef0dbcc200c3389f1…
https://git.kernel.org/stable/c/1e5827839ad0ceb00…
https://git.kernel.org/stable/c/a6366b551079c79bf…
https://git.kernel.org/stable/c/55bd5e685bda455b9…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: ad7f8a1f9ced7f049f9b66d588723f243a7034cd , < ef2ecb6cf268debf3890df99fea01b6452dcf78e (git) Affected: ad7f8a1f9ced7f049f9b66d588723f243a7034cd , < d4e05dedb252ed3e540a0c9be511e427f098110a (git) Affected: ad7f8a1f9ced7f049f9b66d588723f243a7034cd , < 4d5109075a787de28c9e89940f9dee45269f91fa (git) Affected: ad7f8a1f9ced7f049f9b66d588723f243a7034cd , < 53937a2787d29c7a460e984dc4f20ff6ac91dc65 (git) Affected: ad7f8a1f9ced7f049f9b66d588723f243a7034cd , < ef0dbcc200c3389f1f781ab181932a97e54b51af (git) Affected: ad7f8a1f9ced7f049f9b66d588723f243a7034cd , < 1e5827839ad0ceb0079d1560c321fa3656b54f21 (git) Affected: ad7f8a1f9ced7f049f9b66d588723f243a7034cd , < a6366b551079c79bf7bdbadd74c97358bcfe2d58 (git) Affected: ad7f8a1f9ced7f049f9b66d588723f243a7034cd , < 55bd5e685bda455b9b50c835f8c8442d52a344a3 (git)
Linux	Linux	Affected: 3.17 Unaffected: 0 , < 3.17 (semver) Unaffected: 5.10.266 , ≤ 5.10.* (semver) Unaffected: 5.15.217 , ≤ 5.15.* (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.148 , ≤ 6.6.* (semver) Unaffected: 6.12.101 , ≤ 6.12.* (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/display/drm_dp_mst_topology.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "versions": [
            {
              "lessThan": "ef2ecb6cf268debf3890df99fea01b6452dcf78e",
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            {
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              "versionType": "git"
            },
            {
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              "versionType": "git"
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            {
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              "versionType": "git"
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              "versionType": "git"
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              "status": "affected",
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              "versionType": "git"
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          "product": "Linux",
          "programFiles": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.17"
            },
            {
              "lessThan": "3.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.266",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.217",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.266",
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                {
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                  "versionEndExcluding": "7.2",
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/dp/mst: fix buffer overflows in sideband chunk accumulation\n\ndrm_dp_sideband_append_payload() has three related bugs when processing\ndevice-provided sideband reply data:\n\n1. Zero-length curchunk_len underflow: msg_len is a 6-bit field taken\n   directly from the DP sideband header. If a device sends msg_len=0,\n   curchunk_len is set to zero. The condition (curchunk_idx \u003e= curchunk_len)\n   is immediately true, and curchunk_len-1 wraps to 255 (u8 underflow).\n   drm_dp_msg_data_crc4() reads 255 bytes from chunk[48], then memcpy()\n   writes 255 bytes into msg[], both far out of bounds.\n\n2. chunk[48] overflow: curchunk_len can reach 63 (6-bit field). chunk[] is\n   only 48 bytes. Multi-iteration payload assembly appends 16-byte blocks\n   until curchunk_idx reaches curchunk_len, writing up to 15 bytes past\n   the end of chunk[] into msg[].\n\n3. msg[256] overflow: each chunk contributes (curchunk_len-1) bytes to\n   msg[]. No check ensures curlen + (curchunk_len-1) stays within msg[256],\n   so the memcpy can spill into adjacent struct fields.\n\nAll three are reachable from any DP MST device that can forge sideband\nreply messages on a physical connection."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-23T12:46:15.450Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ef2ecb6cf268debf3890df99fea01b6452dcf78e"
        },
        {
          "url": "https://git.kernel.org/stable/c/d4e05dedb252ed3e540a0c9be511e427f098110a"
        },
        {
          "url": "https://git.kernel.org/stable/c/4d5109075a787de28c9e89940f9dee45269f91fa"
        },
        {
          "url": "https://git.kernel.org/stable/c/53937a2787d29c7a460e984dc4f20ff6ac91dc65"
        },
        {
          "url": "https://git.kernel.org/stable/c/ef0dbcc200c3389f1f781ab181932a97e54b51af"
        },
        {
          "url": "https://git.kernel.org/stable/c/1e5827839ad0ceb0079d1560c321fa3656b54f21"
        },
        {
          "url": "https://git.kernel.org/stable/c/a6366b551079c79bf7bdbadd74c97358bcfe2d58"
        },
        {
          "url": "https://git.kernel.org/stable/c/55bd5e685bda455b9b50c835f8c8442d52a344a3"
        }
      ],
      "title": "drm/dp/mst: fix buffer overflows in sideband chunk accumulation",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68278",
    "datePublished": "2026-08-10T12:01:54.285Z",
    "dateReserved": "2026-07-30T09:28:09.379Z",
    "dateUpdated": "2026-08-23T12:46:15.450Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
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CVE-2026-80855 (GCVE-0-2026-80855)

Vulnerability from cvelistv5 – Published: 2026-09-04 15:55 – Updated: 2026-10-30 12:31

Title

fuse: fix invalidate lock leak on open O_TRUNC DAX failure

Summary

In the Linux kernel, the following vulnerability has been resolved: fuse: fix invalidate lock leak on open O_TRUNC DAX failure fuse_open() takes filemap_invalidate_lock() for a DAX truncate (dax_truncate = true) and releases it before the out_inode_unlock label. But when fuse_dax_break_layouts() fails, the goto out_inode_unlock skips the unlock and leaks the rwsem, so any later fault or truncate on the file stalls on the stale lock. fuse_dax_break_layouts() can fail with -ERESTARTSYS when a signal interrupts the wait for busy DAX pages to drain: open("file", O_RDWR | O_TRUNC) └─ fuse_open() ├─ filemap_invalidate_lock() # dax_truncate └─ fuse_dax_break_layouts() └─ dax_break_layout() └─ wait_page_idle() # TASK_INTERRUPTIBLE └─ fuse_wait_dax_page() # unlock, schedule, re-lock └─ signal → -ERESTARTSYS goto out_inode_unlock # <- lock leaked Fix this by moving filemap_invalidate_unlock() below the label so that all error paths release the lock, and rename the label to out_unlock as it now covers more than just the inode lock.

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7018 records in the last 180 days details

References

9 references

URL	Tags
https://git.kernel.org/stable/c/69a294e561c109096…
https://git.kernel.org/stable/c/1b04d80a27d317064…
https://git.kernel.org/stable/c/a61524da59a2f5ac9…
https://git.kernel.org/stable/c/dcf30a56624c2a0cf…
https://git.kernel.org/stable/c/7288c279ddbd654a0…
https://git.kernel.org/stable/c/776e85fda752f9a15…
https://git.kernel.org/stable/c/1d3e701cda2f41d48…
https://git.kernel.org/stable/c/e981474d7bf1457da…
https://git.kernel.org/stable/c/a927f1867e61b78f3…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 81775ab858b4236c52c5da7e25cec6e49dd91b46 , < 69a294e561c10909688bcb25456535dcd1818e1a (git) Affected: d58366aab86854217b81679d1a9dcd54a2edfc2a , < 1b04d80a27d317064cce2307472f5bef9975bc50 (git) Affected: 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b , < a61524da59a2f5ac9c8de23ff98b30da769ab144 (git) Affected: 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b , < dcf30a56624c2a0cfab1bada5b1ca8cc0c02f010 (git) Affected: 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b , < 7288c279ddbd654a06c82118c1a3f5570c1807f0 (git) Affected: 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b , < 776e85fda752f9a15e0f82dec42ecacd12a9bd94 (git) Affected: 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b , < 1d3e701cda2f41d48aa721b3ebefbe0fbf8d74da (git) Affected: 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b , < e981474d7bf1457da12404e169ea147d2c8ecea7 (git) Affected: 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b , < a927f1867e61b78f39f9da0bbba3c98c2ca151fe (git) Affected: b57e150ac2eac791d5d187923b73dc2dafaf67fa (git) Affected: 1fdbbe246daf348adaa0739463384b16ceba1fc0 (git) Affected: 5.10.179 , < 5.10.273 (semver) Affected: 5.15.109 , < 5.15.220 (semver) Affected: 5.18.18 , < 5.19 (semver) Affected: 5.19.2 , < 5.20 (semver)
Linux	Linux	Affected: 6.0 Unaffected: 0 , < 6.0 (semver) Unaffected: 5.10.273 , ≤ 5.10.* (semver) Unaffected: 5.15.220 , ≤ 5.15.* (semver) Unaffected: 6.1.187 , ≤ 6.1.* (semver) Unaffected: 6.6.156 , ≤ 6.6.* (semver) Unaffected: 6.12.108 , ≤ 6.12.* (semver) Unaffected: 6.18.49 , ≤ 6.18.* (semver) Unaffected: 7.1.13 , ≤ 7.1.* (semver) Unaffected: 7.2.3 , ≤ 7.2.* (semver) Unaffected: 7.3 , ≤ * (original_commit_for_fix)

Show details on NVD website

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: fix invalidate lock leak on open O_TRUNC DAX failure\n\nfuse_open() takes filemap_invalidate_lock() for a DAX truncate\n(dax_truncate = true) and releases it before the out_inode_unlock\nlabel.  But when fuse_dax_break_layouts() fails, the goto\nout_inode_unlock skips the unlock and leaks the rwsem, so any later\nfault or truncate on the file stalls on the stale lock.\n\nfuse_dax_break_layouts() can fail with -ERESTARTSYS when a signal\ninterrupts the wait for busy DAX pages to drain:\n\n  open(\"file\", O_RDWR | O_TRUNC)\n  \u2514\u2500 fuse_open()\n     \u251c\u2500 filemap_invalidate_lock()        # dax_truncate\n     \u2514\u2500 fuse_dax_break_layouts()\n        \u2514\u2500 dax_break_layout()\n           \u2514\u2500 wait_page_idle()           # TASK_INTERRUPTIBLE\n              \u2514\u2500 fuse_wait_dax_page()    # unlock, schedule, re-lock\n                 \u2514\u2500 signal \u2192 -ERESTARTSYS\n     goto out_inode_unlock               # \u003c- lock leaked\n\nFix this by moving filemap_invalidate_unlock() below the label so\nthat all error paths release the lock, and rename the label to\nout_unlock as it now covers more than just the inode lock."
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Sightings

Author	Source	Type	Date	Other

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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.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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OESA-2026-4436 (CVE-2026-68278)

CVE-2026-68278 (GCVE-0-2026-68278)

CVE-2026-80855 (GCVE-0-2026-80855)

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