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🛡️ CVE-2024-53155 — kernel

🟠 CVSS 7.1 — High ✅ No Known Exploit NVD
7.1
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

ocfs2: fix uninitialized value in ocfs2_file_read_iter()

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

ocfs2: fix uninitialized value in ocfs2_file_read_iter()

Syzbot has reported the following KMSAN splat:

BUG: KMSAN: uninit-value in ocfs2_file_read_iter+0x9a4/0xf80

ocfs2_file_read_iter+0x9a4/0xf80

__io_read+0x8d4/0x20f0

io_read+0x3e/0xf0

io_issue_sqe+0x42b/0x22c0

io_wq_submit_work+0xaf9/0xdc0

io_worker_handle_work+0xd13/0x2110

io_wq_worker+0x447/0x1410

ret_from_fork+0x6f/0x90

ret_from_fork_asm+0x1a/0x30

Uninit was created at:

__alloc_pages_noprof+0x9a7/0xe00

alloc_pages_mpol_noprof+0x299/0x990

alloc_pages_noprof+0x1bf/0x1e0

allocate_slab+0x33a/0x1250

___slab_alloc+0x12ef/0x35e0

kmem_cache_alloc_bulk_noprof+0x486/0x1330

__io_alloc_req_refill+0x84/0x560

io_submit_sqes+0x172f/0x2f30

__se_sys_io_uring_enter+0x406/0x41c0

__x64_sys_io_uring_enter+0x11f/0x1a0

x64_sys_call+0x2b54/0x3ba0

do_syscall_64+0xcd/0x1e0

entry_SYSCALL_64_after_hwframe+0x77/0x7f

Since an instance of 'struct kiocb' may be passed from the block layer

with 'private' field uninitialized, introduce 'ocfs2_iocb_init_rw_locked()'

and use it from where 'ocfs2_dio_end_io()' might take care, i.e. in

'ocfs2_file_read_iter()' and 'ocfs2_file_write_iter()'.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: None.
  • Availability impact: High — total loss, or loss the attacker controls.

Affected software

CVE-2024-53155 is recorded against 2 packages.

  • kernel (from 6.12.0 up to 6.12.2)
  • linux-kernel (from 6.12 up to 6.12.2)

Timeline and source

Published on 24 December 2024 and last revised on 12 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
lists.debian.org (Web)
lists.debian.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

Other advisories for this package

kernel has other advisories on record. If you are patching this one, these are worth checking on the same host:

CVE-2024-53155 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity High
CVSS Score 7.1
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2024-12-24
Updated 2026-08-20
Modified 2026-08-12

Affected Packages

Software From version Fixed in
kernel 6.12.0 6.12.2
linux-kernel 6.12 6.12.2

References

Similar Threats

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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