CVE-2024-56584

MEDIUM

MEDIUM Priority: 0.01 BB Relevance: 36/100

Published: 2024-12-27 Modified: 2026-11-05 First seen: 2026-11-05 Status: active

Attack Surface

Low Complexity No Interaction

CVSS Vector Breakdown

AV: Local

AC: Low

PR: Low

UI: None

S: Unchanged

C: None

I: None

A: High

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.

Weakness Classification (1)

CWE-770

Affected Software (8)

Vendor	Product	Version
Linux	Linux	2b188cc1bb857a9d4701ae59aa7768b5124e262e < e05c070b401f6365c503e2b59f091331965c4fb9
Linux	Linux	2b188cc1bb857a9d4701ae59aa7768b5124e262e < 3a84fa784710990964c1e35df743851ab2863898
Linux	Linux	2b188cc1bb857a9d4701ae59aa7768b5124e262e < 94ad56f61b873ffeebcc620d451eacfbdf9d40f0
Linux	Linux	2b188cc1bb857a9d4701ae59aa7768b5124e262e < 42882b583095dcf747da6e3af1daeff40e27033e
Linux	Linux	2b188cc1bb857a9d4701ae59aa7768b5124e262e < d5b2ddf1f90c7248eff9630b95895c8950f2f36d
Linux	Linux	2b188cc1bb857a9d4701ae59aa7768b5124e262e < 7eb75ce7527129d7f1fee6951566af409a37a1c4
Linux	Linux	5.1
linux	linux_kernel	5.1 – 6.1.120