CVE-2024-39469
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix nilfs_empty_dir() misjudgment and long loop on I/O errors The error handling in nilfs_empty_dir() when a directory folio/page read fails is incorrect, as in the old ext2…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.24%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix nilfs_empty_dir() misjudgment and long loop on I/O errors The error handling in nilfs_empty_dir() when a directory folio/page read fails is incorrect, as in the old ext2 implementation, and if the folio/page cannot be read or nilfs_check_folio() fails, it will falsely determine the directory as empty and corrupt the file system. In addition, since nilfs_empty_dir() does not immediately return on a failed folio/page read, but continues to loop, this can cause a long loop with I/O if i_size of the directory's inode is also corrupted, causing the log writer thread to wait and hang, as reported by syzbot. Fix these issues by making nilfs_empty_dir() immediately return a false value (0) if it fails to get a directory folio/page.
- CVSS 3.1
- 7.1 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
- EPSS
- 0.24% probability · 16th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/11a2edb70356a2202dcb7c9c189c8356ab4752cdPatch
- https://git.kernel.org/stable/c/129dcd3e7d036218db3f59c82d82004b9539ed82Patch
- https://git.kernel.org/stable/c/2ac8a2fe22bdde9eecce2a42cf5cab79333fb428Patch
- https://git.kernel.org/stable/c/405b71f1251e5ae865f53bd27c45114e6c83bee3Patch
- https://git.kernel.org/stable/c/59f14875a96ef93f05b82ad3c980605f2cb444b5Patch
- https://git.kernel.org/stable/c/7373a51e7998b508af7136530f3a997b286ce81cPatch
- https://git.kernel.org/stable/c/c77ad608df6c091fe64ecb91f41ef7cb465587f1Patch
- https://git.kernel.org/stable/c/d18b05eda7fa77f02114f15b02c009f28ee42346Patch
- https://git.kernel.org/stable/c/11a2edb70356a2202dcb7c9c189c8356ab4752cdPatch
- https://git.kernel.org/stable/c/129dcd3e7d036218db3f59c82d82004b9539ed82Patch
- https://git.kernel.org/stable/c/2ac8a2fe22bdde9eecce2a42cf5cab79333fb428Patch
- https://git.kernel.org/stable/c/405b71f1251e5ae865f53bd27c45114e6c83bee3Patch
- https://git.kernel.org/stable/c/59f14875a96ef93f05b82ad3c980605f2cb444b5Patch
- https://git.kernel.org/stable/c/7373a51e7998b508af7136530f3a997b286ce81cPatch
- https://git.kernel.org/stable/c/c77ad608df6c091fe64ecb91f41ef7cb465587f1Patch
- https://git.kernel.org/stable/c/d18b05eda7fa77f02114f15b02c009f28ee42346Patch
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.