CVE-2024-56584

MEDIUM EPSS 13.8%
Published Dec 27, 20241y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Dec 27, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: io_uring/tctx: work around xa_store() allocation error issue syzbot triggered the following WARN_ON: WARNING: CPU: 0 PID: 16 at io_uring/tctx.c:51 __io_uring_free+0xfa/0x140 io_uring/tctx.c:51 which is the WARN_ON_ONCE(!xa_empty(&tctx->xa)); sanity check in __io_uring_free() when a io_uring_task is going through its final put. The syzbot test case includes injecting memory allocation failures, and it very much looks like xa_store() can fail one of its memory allocations and end up with ->head being non-NULL even though no entries exist in the xarray. Until this issue gets sorted out, work around it by attempting to iterate entries in our xarray, and WARN_ON_ONCE() if one is found.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
13.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-770

Affected Products 3

VendorProductVersionRange
linuxlinux_kernel*≥5.1  –  <6.1.120
linuxlinux_kernel*≥6.2  –  <6.6.66
linuxlinux_kernel*≥6.7  –  <6.12.5

References 7

  • git.kernel.org https://git.kernel.org/stable/c/3a84fa784710990964c1e35df743851ab2863898
  • git.kernel.org https://git.kernel.org/stable/c/42882b583095dcf747da6e3af1daeff40e27033e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7eb75ce7527129d7f1fee6951566af409a37a1c4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/94ad56f61b873ffeebcc620d451eacfbdf9d40f0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d5b2ddf1f90c7248eff9630b95895c8950f2f36d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e05c070b401f6365c503e2b59f091331965c4fb9
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/42882b583095dcf747da6e3af1daeff40e27033e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7eb75ce7527129d7f1fee6951566af409a37a1c4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/94ad56f61b873ffeebcc620d451eacfbdf9d40f0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d5b2ddf1f90c7248eff9630b95895c8950f2f36d
    Patch