CVE-2025-39736 (GCVE-0-2025-39736)

Vulnerability from cvelistv5 – Published: 2025-09-11 16:52 – Updated: 2025-11-03 17:42
VLAI?
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/kmemleak: avoid deadlock by moving pr_warn() outside kmemleak_lock When netpoll is enabled, calling pr_warn_once() while holding kmemleak_lock in mem_pool_alloc() can cause a deadlock due to lock inversion with the netconsole subsystem. This occurs because pr_warn_once() may trigger netpoll, which eventually leads to __alloc_skb() and back into kmemleak code, attempting to reacquire kmemleak_lock. This is the path for the deadlock. mem_pool_alloc() -> raw_spin_lock_irqsave(&kmemleak_lock, flags); -> pr_warn_once() -> netconsole subsystem -> netpoll -> __alloc_skb -> __create_object -> raw_spin_lock_irqsave(&kmemleak_lock, flags); Fix this by setting a flag and issuing the pr_warn_once() after kmemleak_lock is released.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: c5665868183fec689dbab9fb8505188b2c4f0757 , < c7b6ea0ede687e7460e593c5ea478f50aa41682a (git)
Affected: c5665868183fec689dbab9fb8505188b2c4f0757 , < 4b0151e1d468eb2667c37b7af99b3c075072d334 (git)
Affected: c5665868183fec689dbab9fb8505188b2c4f0757 , < f249d32bb54876b4b6c3ae071af8ddca77af390b (git)
Affected: c5665868183fec689dbab9fb8505188b2c4f0757 , < 62879faa8efe8d8a9c7bf7606ee9c068012d7dac (git)
Affected: c5665868183fec689dbab9fb8505188b2c4f0757 , < 1da95d3d4b7b1d380ebd87b71a61e7e6aed3265d (git)
Affected: c5665868183fec689dbab9fb8505188b2c4f0757 , < a0854de00ce2ee27edf39037e7836ad580eb3350 (git)
Affected: c5665868183fec689dbab9fb8505188b2c4f0757 , < 08f70be5e406ce47c822f2dd11c1170ca259605b (git)
Affected: c5665868183fec689dbab9fb8505188b2c4f0757 , < a181b228b37a6a5625dad2bb4265bb7abb673e9f (git)
Affected: c5665868183fec689dbab9fb8505188b2c4f0757 , < 47b0f6d8f0d2be4d311a49e13d2fd5f152f492b2 (git)
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    Linux Linux Affected: 5.4
Unaffected: 0 , < 5.4 (semver)
Unaffected: 5.4.297 , ≤ 5.4.* (semver)
Unaffected: 5.10.241 , ≤ 5.10.* (semver)
Unaffected: 5.15.190 , ≤ 5.15.* (semver)
Unaffected: 6.1.149 , ≤ 6.1.* (semver)
Unaffected: 6.6.103 , ≤ 6.6.* (semver)
Unaffected: 6.12.43 , ≤ 6.12.* (semver)
Unaffected: 6.15.11 , ≤ 6.15.* (semver)
Unaffected: 6.16.2 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
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}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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Detection rules are retrieved from Rulezet.