CVE-2024-49960

HIGH EPSS 18.6%
Published Oct 21, 20241y ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Oct 21, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: ext4: fix timer use-after-free on failed mount Syzbot has found an ODEBUG bug in ext4_fill_super The del_timer_sync function cancels the s_err_report timer, which reminds about filesystem errors daily. We should guarantee the timer is no longer active before kfree(sbi). When filesystem mounting fails, the flow goes to failed_mount3, where an error occurs when ext4_stop_mmpd is called, causing a read I/O failure. This triggers the ext4_handle_error function that ultimately re-arms the timer, leaving the s_err_report timer active before kfree(sbi) is called. Fix the issue by canceling the s_err_report timer after calling ext4_stop_mmpd.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
18.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 7

VendorProductVersionRange
debiandebian_linux11.0any
linuxlinux_kernel* <5.10.237
linuxlinux_kernel*≥5.11  –  <5.15.181
linuxlinux_kernel*≥5.16  –  <6.1.118
linuxlinux_kernel*≥6.2  –  <6.6.55
linuxlinux_kernel*≥6.7  –  <6.10.14
linuxlinux_kernel*≥6.11  –  <6.11.3

References 9

  • git.kernel.org https://git.kernel.org/stable/c/0ce160c5bdb67081a62293028dc85758a8efb22a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/22e9b83f0f33bc5a7a3181769d1dccbf021f5b04
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7aac0c17a8cdf4a3236991c1e60435c6a984076c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9203817ba46ebba7c865c8de2aba399537b6e891
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b85569585d0154d4db1e4f9e3e6a4731d407feb0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cf3196e5e2f36cd80dab91ffae402e13935724bc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fa78fb51d396f4f2f80f8e96a3b1516f394258be
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
    Mailing ListThird Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
    Mailing ListThird Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0ce160c5bdb67081a62293028dc85758a8efb22a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/22e9b83f0f33bc5a7a3181769d1dccbf021f5b04
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7aac0c17a8cdf4a3236991c1e60435c6a984076c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9203817ba46ebba7c865c8de2aba399537b6e891
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b85569585d0154d4db1e4f9e3e6a4731d407feb0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cf3196e5e2f36cd80dab91ffae402e13935724bc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fa78fb51d396f4f2f80f8e96a3b1516f394258be
    Patch