f2fs: compress: don't allow unaligned truncation on released compress inode

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2024-33847
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-06-24 14:15:11 UTC
Updated2026-05-12 12:16:35 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: f2fs: compress: don't allow unaligned truncation on released compress inode f2fs image may be corrupted after below testcase: - mkfs.f2fs -O extra_attr,compression -f /dev/vdb - mount /dev/vdb /mnt/f2fs - touch /mnt/f2fs/file - f2fs_io setflags compression /mnt/f2fs/file - dd if=/dev/zero of=/mnt/f2fs/file bs=4k count=4 - f2fs_io release_cblocks /mnt/f2fs/file - truncate -s 8192 /mnt/f2fs/file - umount /mnt/f2fs - fsck.f2fs /dev/vdb [ASSERT] (fsck_chk_inode_blk:1256) --> ino: 0x5 has i_blocks: 0x00000002, but has 0x3 blocks [FSCK] valid_block_count matching with CP [Fail] [0x4, 0x5] [FSCK] other corrupted bugs [Fail] The reason is: partial truncation assume compressed inode has reserved blocks, after partial truncation, valid block count may change w/o .i_blocks and .total_valid_block_count update, result in corruption. This patch only allow cluster size aligned truncation on released compress inode for fixing.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 8e1651cd667cd6779db28314844d88b6de8312a3 b8962cf98595d1ec62f40f23667de830567ec8bc git Not specified
CNA Linux Linux affected c61404153eb683da9c35aad133131554861ed561 8acae047215024d1ac499b3c8337ef1b952f160b git Not specified
CNA Linux Linux affected c61404153eb683da9c35aad133131554861ed561 3ccf5210dc941a7aa0180596ac021568be4d35ec git Not specified
CNA Linux Linux affected c61404153eb683da9c35aad133131554861ed561 9f9341064a9b5246a32a7fe56b9f80c6f7f3c62d git Not specified
CNA Linux Linux affected c61404153eb683da9c35aad133131554861ed561 5268241b41b1c5d0acca75e9b97d4fd719251c8c git Not specified
CNA Linux Linux affected c61404153eb683da9c35aad133131554861ed561 29ed2b5dd521ce7c5d8466cd70bf0cc9d07afeee git Not specified
CNA Linux Linux affected 5.14 Not specified
CNA Linux Linux unaffected 5.14 semver Not specified
CNA Linux Linux unaffected 5.15.161 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.93 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.33 6.6.* semver Not specified
CNA Linux Linux unaffected 6.9.4 6.9.* semver Not specified
CNA Linux Linux unaffected 6.10 * original_commit_for_fix Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected * custom Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/9f9341064a9b5246a32a7fe56b9f80c6f7f3c62d af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-265688.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/8acae047215024d1ac499b3c8337ef1b952f160b af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/b8962cf98595d1ec62f40f23667de830567ec8bc af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/5268241b41b1c5d0acca75e9b97d4fd719251c8c af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/29ed2b5dd521ce7c5d8466cd70bf0cc9d07afeee af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/3ccf5210dc941a7aa0180596ac021568be4d35ec af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
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