CVE-2025-39841: scsi: lpfc: Fix buffer free/clear order in deferred receive path
Vulnerability summary
CVE-2025-39841 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in debian debian_linux. EPSS estimates a 0.48% chance of exploitation in the next 30 days, higher than 41.5% of scored vulnerabilities.
Severe, CVSS 9.8 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 0% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 55 · Related 35Timeline
- 19-09-2025PublishedVulnerability first disclosed.
- 05-08-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HDiffers
- NVDNIST7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HDiffers
EPSS trend
Probability
0.48%
Chance of exploitation in the next 30 days
Percentile
42%
Versus all other CVEs
30-day change
Increase +0.01 pp
From 0.47% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu144 products
- linuxAll versions (No fix recorded) | < 5.15.0-163.173 | < 6.8.0-106.106
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1097.104 | < 6.8.0-1050.53
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian2 products
- linux< 6.1.153-1 | < 6.12.48-1 | < 6.16.6-1
- debian_linuxEOL11.0
Linux2 products
- linux≥ 472e146d1cf3410a898b49834500fa9e33ac41a2, < ab34084f42ee06a9028d67c78feafb911d33d111 | ≥ 472e146d1cf3410a898b49834500fa9e33ac41a2, < baa39f6ad79d372a6ce0aa639fbb2f1578479f57 | ≥ 472e146d1cf3410a898b49834500fa9e33ac41a2, < 95b63d15fce5c54a73bbf195e1aacb5a75b128e2 | ≥ 472e146d1cf3410a898b49834500fa9e33ac41a2, < 55658c7501467ca9ef3bd4453dd920010db8bc13 | ≥ 472e146d1cf3410a898b49834500fa9e33ac41a2, < d96cc9a1b57725930c60b607423759d563b4d900 | ≥ 472e146d1cf3410a898b49834500fa9e33ac41a2, < 367cb5ffd8a8a4c85dc89f55e7fa7cc191425b11 | ≥ 472e146d1cf3410a898b49834500fa9e33ac41a2, < 897f64b01c1249ac730329b83f4f40bab71e86c7 | ≥ 472e146d1cf3410a898b49834500fa9e33ac41a2, < 9dba9a45c348e8460da97c450cddf70b2056deb3 | 5.1
- linux_kernel≥ 5.1, < 5.4.299 | ≥ 5.5, < 5.10.243 | ≥ 5.11, < 5.15.192 | ≥ 5.16, < 6.1.151 | ≥ 6.2, < 6.6.105 | ≥ 6.7, < 6.12.46 | ≥ 6.13, < 6.16.6 | 6.17:rc1 | 6.17:rc2 | 6.17:rc3 | 6.17:rc4
3 vendors · 148 products
