CVE-2025-39841: Linux hwe edge · In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix buffer free/clear order in deferred receive path Fix a
Affects linux-hwe-edgeSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 9.8 High · patch available : patch linux-hwe-edge soon.
Data as of 25 Oct 2026, 19:02 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 41% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 19 Sep 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Red Hatredhat/kernelpkg:rpm/redhat/kernelOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Red Hat has released updated kernel packages that fix these vulnerabilities. Users of Red Hat Enterprise Linux 9.4 Extended Update Support should apply the kernel update as described in the Red Hat advisory (RHSA-2025:22661) and reboot their systems to activate the fixes. This is the official and recommended remediation.
Description
In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix buffer free/clear order in deferred receive path Fix a use-after-free window by correcting the buffer release sequence in the deferred receive path. The code freed the RQ buffer first and only then cleared the context pointer under the lock. Concurrent paths (e.g., ABTS and the repost path) also inspect and release the same pointer under the lock, so the old order could lead to double-free/UAF. Note that the repost path already uses the correct pattern: detach the pointer under the lock, then free it after dropping the lock. The deferred path should do the same.
References
- access.redhat.com/errata/RHSA-2025:22661 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2396944 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2397553 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_22661.json (opens in a new tab)
- ubuntu.com/security/CVE-2025-39841 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2025-39841 (opens in a new tab)
- git.kernel.org/linus/9dba9a45c348e8460da97c450cddf70b2056deb3 (opens in a new tab)
- git.kernel.org/stable/c/367cb5ffd8a8a4c85dc89f55e7fa7cc191425b11 (opens in a new tab)
- git.kernel.org/stable/c/55658c7501467ca9ef3bd4453dd920010db8bc13 (opens in a new tab)
- git.kernel.org/stable/c/897f64b01c1249ac730329b83f4f40bab71e86c7 (opens in a new tab)
- git.kernel.org/stable/c/95b63d15fce5c54a73bbf195e1aacb5a75b128e2 (opens in a new tab)
- git.kernel.org/stable/c/9dba9a45c348e8460da97c450cddf70b2056deb3 (opens in a new tab)
- git.kernel.org/stable/c/ab34084f42ee06a9028d67c78feafb911d33d111 (opens in a new tab)
- git.kernel.org/stable/c/baa39f6ad79d372a6ce0aa639fbb2f1578479f57 (opens in a new tab)
- git.kernel.org/stable/c/d96cc9a1b57725930c60b607423759d563b4d900 (opens in a new tab)
- ubuntu.com/security/notices/USN-7909-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7909-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7909-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-7910-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7909-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-7910-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7933-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7909-5 (opens in a new tab)
- ubuntu.com/security/notices/USN-7938-1 (opens in a new tab)