Vulnerability-Lookup

FKIE_CVE-2026-43349

Vulnerability from fkie_nvd - Published: 2026-05-08 14:16 - Updated: 2026-05-15 19:09

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid uninit-value access in f2fs_sanity_check_node_footer syzbot reported a f2fs bug as below: BUG: KMSAN: uninit-value in f2fs_sanity_check_node_footer+0x374/0xa20 fs/f2fs/node.c:1520 f2fs_sanity_check_node_footer+0x374/0xa20 fs/f2fs/node.c:1520 f2fs_finish_read_bio+0xe1e/0x1d60 fs/f2fs/data.c:177 f2fs_read_end_io+0x6ab/0x2220 fs/f2fs/data.c:-1 bio_endio+0x1006/0x1160 block/bio.c:1792 submit_bio_noacct+0x533/0x2960 block/blk-core.c:891 submit_bio+0x57a/0x620 block/blk-core.c:926 blk_crypto_submit_bio include/linux/blk-crypto.h:203 [inline] f2fs_submit_read_bio+0x12c/0x360 fs/f2fs/data.c:557 f2fs_submit_page_bio+0xee2/0x1450 fs/f2fs/data.c:775 read_node_folio+0x384/0x4b0 fs/f2fs/node.c:1481 __get_node_folio+0x5db/0x15d0 fs/f2fs/node.c:1576 f2fs_get_inode_folio+0x40/0x50 fs/f2fs/node.c:1623 do_read_inode fs/f2fs/inode.c:425 [inline] f2fs_iget+0x1209/0x9380 fs/f2fs/inode.c:596 f2fs_fill_super+0x8f5a/0xb2e0 fs/f2fs/super.c:5184 get_tree_bdev_flags+0x6e6/0x920 fs/super.c:1694 get_tree_bdev+0x38/0x50 fs/super.c:1717 f2fs_get_tree+0x35/0x40 fs/f2fs/super.c:5436 vfs_get_tree+0xb3/0x5d0 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3763 [inline] do_new_mount+0x885/0x1dd0 fs/namespace.c:3839 path_mount+0x7a2/0x20b0 fs/namespace.c:4159 do_mount fs/namespace.c:4172 [inline] __do_sys_mount fs/namespace.c:4361 [inline] __se_sys_mount+0x704/0x7f0 fs/namespace.c:4338 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4338 x64_sys_call+0x39f0/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The root cause is: in f2fs_finish_read_bio(), we may access uninit data in folio if we failed to read the data from device into folio, let's add a check condition to avoid such issue.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/59970b2586fef4b13e96527b9d232bed30b640cd	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7b9161a605e91d0987e2596a245dc1f21621b23f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a10b89343d41ceee1af0ec38d3a74e526c77fa09	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "A1B4E07B-2A42-4876-87B4-C1D7EC00F7AB",
              "versionEndExcluding": "6.18.25",
              "versionStartIncluding": "6.18.13",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4F3D8E46-B7D5-4D3B-B2E1-515A184085AA",
              "versionEndExcluding": "7.0",
              "versionStartIncluding": "6.19.3",
              "vulnerable": true
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            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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          "negate": false,
          "operator": "OR"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid uninit-value access in f2fs_sanity_check_node_footer\n\nsyzbot reported a f2fs bug as below:\n\nBUG: KMSAN: uninit-value in f2fs_sanity_check_node_footer+0x374/0xa20 fs/f2fs/node.c:1520\n f2fs_sanity_check_node_footer+0x374/0xa20 fs/f2fs/node.c:1520\n f2fs_finish_read_bio+0xe1e/0x1d60 fs/f2fs/data.c:177\n f2fs_read_end_io+0x6ab/0x2220 fs/f2fs/data.c:-1\n bio_endio+0x1006/0x1160 block/bio.c:1792\n submit_bio_noacct+0x533/0x2960 block/blk-core.c:891\n submit_bio+0x57a/0x620 block/blk-core.c:926\n blk_crypto_submit_bio include/linux/blk-crypto.h:203 [inline]\n f2fs_submit_read_bio+0x12c/0x360 fs/f2fs/data.c:557\n f2fs_submit_page_bio+0xee2/0x1450 fs/f2fs/data.c:775\n read_node_folio+0x384/0x4b0 fs/f2fs/node.c:1481\n __get_node_folio+0x5db/0x15d0 fs/f2fs/node.c:1576\n f2fs_get_inode_folio+0x40/0x50 fs/f2fs/node.c:1623\n do_read_inode fs/f2fs/inode.c:425 [inline]\n f2fs_iget+0x1209/0x9380 fs/f2fs/inode.c:596\n f2fs_fill_super+0x8f5a/0xb2e0 fs/f2fs/super.c:5184\n get_tree_bdev_flags+0x6e6/0x920 fs/super.c:1694\n get_tree_bdev+0x38/0x50 fs/super.c:1717\n f2fs_get_tree+0x35/0x40 fs/f2fs/super.c:5436\n vfs_get_tree+0xb3/0x5d0 fs/super.c:1754\n fc_mount fs/namespace.c:1193 [inline]\n do_new_mount_fc fs/namespace.c:3763 [inline]\n do_new_mount+0x885/0x1dd0 fs/namespace.c:3839\n path_mount+0x7a2/0x20b0 fs/namespace.c:4159\n do_mount fs/namespace.c:4172 [inline]\n __do_sys_mount fs/namespace.c:4361 [inline]\n __se_sys_mount+0x704/0x7f0 fs/namespace.c:4338\n __x64_sys_mount+0xe4/0x150 fs/namespace.c:4338\n x64_sys_call+0x39f0/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:166\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThe root cause is: in f2fs_finish_read_bio(), we may access uninit data\nin folio if we failed to read the data from device into folio, let\u0027s add\na check condition to avoid such issue."
    }
  ],
  "id": "CVE-2026-43349",
  "lastModified": "2026-05-15T19:09:19.747",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-05-08T14:16:44.997",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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    },
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    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-908"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-43349 (GCVE-0-2026-43349)

Vulnerability from cvelistv5 – Published: 2026-05-08 13:41 – Updated: 2026-05-11 22:22

Title

f2fs: fix to avoid uninit-value access in f2fs_sanity_check_node_footer

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/59970b2586fef4b13…
https://git.kernel.org/stable/c/a10b89343d41ceee1…
https://git.kernel.org/stable/c/7b9161a605e91d098…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 855c54f1803e3ebc613677b4f389c7f92656a1fc , < 59970b2586fef4b13e96527b9d232bed30b640cd (git) Affected: 50ac3ecd8e05b6bcc350c71a4307d40c030ec7e4 , < a10b89343d41ceee1af0ec38d3a74e526c77fa09 (git) Affected: 50ac3ecd8e05b6bcc350c71a4307d40c030ec7e4 , < 7b9161a605e91d0987e2596a245dc1f21621b23f (git) Affected: c386753db52b3a80afa6612bfdcb925aa5ca260f (git)
Linux	Linux	Affected: 7.0 Unaffected: 0 , < 7.0 (semver) Unaffected: 6.18.25 , ≤ 6.18.* (semver) Unaffected: 7.0.2 , ≤ 7.0.* (semver) Unaffected: 7.1-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/f2fs/data.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "6.18.25",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.0.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1-rc1",
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid uninit-value access in f2fs_sanity_check_node_footer\n\nsyzbot reported a f2fs bug as below:\n\nBUG: KMSAN: uninit-value in f2fs_sanity_check_node_footer+0x374/0xa20 fs/f2fs/node.c:1520\n f2fs_sanity_check_node_footer+0x374/0xa20 fs/f2fs/node.c:1520\n f2fs_finish_read_bio+0xe1e/0x1d60 fs/f2fs/data.c:177\n f2fs_read_end_io+0x6ab/0x2220 fs/f2fs/data.c:-1\n bio_endio+0x1006/0x1160 block/bio.c:1792\n submit_bio_noacct+0x533/0x2960 block/blk-core.c:891\n submit_bio+0x57a/0x620 block/blk-core.c:926\n blk_crypto_submit_bio include/linux/blk-crypto.h:203 [inline]\n f2fs_submit_read_bio+0x12c/0x360 fs/f2fs/data.c:557\n f2fs_submit_page_bio+0xee2/0x1450 fs/f2fs/data.c:775\n read_node_folio+0x384/0x4b0 fs/f2fs/node.c:1481\n __get_node_folio+0x5db/0x15d0 fs/f2fs/node.c:1576\n f2fs_get_inode_folio+0x40/0x50 fs/f2fs/node.c:1623\n do_read_inode fs/f2fs/inode.c:425 [inline]\n f2fs_iget+0x1209/0x9380 fs/f2fs/inode.c:596\n f2fs_fill_super+0x8f5a/0xb2e0 fs/f2fs/super.c:5184\n get_tree_bdev_flags+0x6e6/0x920 fs/super.c:1694\n get_tree_bdev+0x38/0x50 fs/super.c:1717\n f2fs_get_tree+0x35/0x40 fs/f2fs/super.c:5436\n vfs_get_tree+0xb3/0x5d0 fs/super.c:1754\n fc_mount fs/namespace.c:1193 [inline]\n do_new_mount_fc fs/namespace.c:3763 [inline]\n do_new_mount+0x885/0x1dd0 fs/namespace.c:3839\n path_mount+0x7a2/0x20b0 fs/namespace.c:4159\n do_mount fs/namespace.c:4172 [inline]\n __do_sys_mount fs/namespace.c:4361 [inline]\n __se_sys_mount+0x704/0x7f0 fs/namespace.c:4338\n __x64_sys_mount+0xe4/0x150 fs/namespace.c:4338\n x64_sys_call+0x39f0/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:166\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThe root cause is: in f2fs_finish_read_bio(), we may access uninit data\nin folio if we failed to read the data from device into folio, let\u0027s add\na check condition to avoid such issue."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:22:51.282Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/7b9161a605e91d0987e2596a245dc1f21621b23f"
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      ],
      "title": "f2fs: fix to avoid uninit-value access in f2fs_sanity_check_node_footer",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43349",
    "datePublished": "2026-05-08T13:41:52.611Z",
    "dateReserved": "2026-05-01T14:12:56.003Z",
    "dateUpdated": "2026-05-11T22:22:51.282Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}

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.

Action not permitted

FKIE_CVE-2026-43349

CVE-2026-43349 (GCVE-0-2026-43349)

Tags

Sightings

Nomenclature