CVE-2025-21889

MEDIUM EPSS 7.5%
Published Mar 27, 20251y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Mar 27, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: perf/core: Add RCU read lock protection to perf_iterate_ctx() The perf_iterate_ctx() function performs RCU list traversal but currently lacks RCU read lock protection. This causes lockdep warnings when running perf probe with unshare(1) under CONFIG_PROVE_RCU_LIST=y: WARNING: suspicious RCU usage kernel/events/core.c:8168 RCU-list traversed in non-reader section!! Call Trace: lockdep_rcu_suspicious ? perf_event_addr_filters_apply perf_iterate_ctx perf_event_exec begin_new_exec ? load_elf_phdrs load_elf_binary ? lock_acquire ? find_held_lock ? bprm_execve bprm_execve do_execveat_common.isra.0 __x64_sys_execve do_syscall_64 entry_SYSCALL_64_after_hwframe This protection was previously present but was removed in commit bd2756811766 ("perf: Rewrite core context handling"). Add back the necessary rcu_read_lock()/rcu_read_unlock() pair around perf_iterate_ctx() call in perf_event_exec(). [ mingo: Use scoped_guard() as suggested by Peter ]

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
7.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 7

VendorProductVersionRange
linuxlinux_kernel*≥6.2  –  <6.6.81
linuxlinux_kernel*≥6.7  –  <6.12.18
linuxlinux_kernel*≥6.13  –  <6.13.6
linuxlinux_kernel6.14any
linuxlinux_kernel6.14any
linuxlinux_kernel6.14any
linuxlinux_kernel6.14any

References 4

  • git.kernel.org https://git.kernel.org/stable/c/0fe8813baf4b2e865d3b2c735ce1a15b86002c74
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a2475ccad6120546ea45dbcd6cd1f74dc565ef6b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dd536566dda9a551fc2a2acfab5313a5bb13ed02
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f390c2eea571945f357a2d3b9fcb1c015767132e
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0fe8813baf4b2e865d3b2c735ce1a15b86002c74
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a2475ccad6120546ea45dbcd6cd1f74dc565ef6b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dd536566dda9a551fc2a2acfab5313a5bb13ed02
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f390c2eea571945f357a2d3b9fcb1c015767132e
    Patch