CVE - CVE-2025-21889

CVE-ID
CVE-2025-21889	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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 ]
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/0fe8813baf4b2e865d3b2c735ce1a15b86002c74 URL:https://git.kernel.org/stable/c/0fe8813baf4b2e865d3b2c735ce1a15b86002c74 MISC:https://git.kernel.org/stable/c/a2475ccad6120546ea45dbcd6cd1f74dc565ef6b URL:https://git.kernel.org/stable/c/a2475ccad6120546ea45dbcd6cd1f74dc565ef6b MISC:https://git.kernel.org/stable/c/dd536566dda9a551fc2a2acfab5313a5bb13ed02 URL:https://git.kernel.org/stable/c/dd536566dda9a551fc2a2acfab5313a5bb13ed02 MISC:https://git.kernel.org/stable/c/f390c2eea571945f357a2d3b9fcb1c015767132e URL:https://git.kernel.org/stable/c/f390c2eea571945f357a2d3b9fcb1c015767132e
Assigning CNA
kernel.org
Date Record Created
20241229	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241229)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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