CVE-2024-26955 nilfs2: prevent kernel bug at submit_bh_wbc()

2024-05-0105:18:51

Linux

www.cve.org

nilfs2

kernel bug

fix

cve-2024-26955

linux

7.7 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

13.2%

JSON

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

nilfs2: prevent kernel bug at submit_bh_wbc()

Fix a bug where nilfs_get_block() returns a successful status when
searching and inserting the specified block both fail inconsistently. If
this inconsistent behavior is not due to a previously fixed bug, then an
unexpected race is occurring, so return a temporary error -EAGAIN instead.

This prevents callers such as __block_write_begin_int() from requesting a
read into a buffer that is not mapped, which would cause the BUG_ON check
for the BH_Mapped flag in submit_bh_wbc() to fail.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/nilfs2/inode.c"
    ],
    "versions": [
      {
        "version": "1f5abe7e7dbc",
        "lessThan": "91e4c4595fae",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1f5abe7e7dbc",
        "lessThan": "32eaee72e965",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1f5abe7e7dbc",
        "lessThan": "f0fe7ad5aff4",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1f5abe7e7dbc",
        "lessThan": "ca581d237f3b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1f5abe7e7dbc",
        "lessThan": "192e9f9078c9",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1f5abe7e7dbc",
        "lessThan": "0c8aa4cfda4e",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1f5abe7e7dbc",
        "lessThan": "48d443d20023",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1f5abe7e7dbc",
        "lessThan": "76ffbe911e27",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1f5abe7e7dbc",
        "lessThan": "269cdf353b5b",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/nilfs2/inode.c"
    ],
    "versions": [
      {
        "version": "2.6.30",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "2.6.30",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.312",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.274",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.215",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.154",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.84",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.24",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.7.12",
        "lessThanOrEqual": "6.7.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8.3",
        "lessThanOrEqual": "6.8.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]