CVE-2021-47183scsi: lpfc: Fix link down processing to address NULL pointer dereference
- 8.8HighCVSS base score
- 0.34%Exploitation in 30 daysEPSS · top 73% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix link down processing to address NULL pointer dereference If an FC link down transition while PLOGIs are outstanding to fabric well known addresses, outstanding ABTS requests may result in a NULL pointer dereference. Driver unload requests may hang with repeated "2878" log messages. The Link down processing results in ABTS requests for outstanding ELS requests. The Abort WQEs are sent for the ELSs before the driver had set the link state to down. Thus the driver is sending the Abort with the expectation that an ABTS will be sent on the wire. The Abort request is stalled waiting for the link to come up. In some conditions the driver may auto-complete the ELSs thus if the link does come up, the Abort completions may reference an invalid structure. Fix by ensuring that Abort set the flag to avoid link traffic if issued due to conditions where the link failed.
Timeline
ID reserved
By Linux
- 16 days later
· 16 days later
Published
- 2 years later
· 2 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.34% · top 73% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
- affected 70f3c073362ef7b5e55c92b83eb2dd9a7fb4e9bf – < 04c1af683270e4709a594bb1691b8800b945035a
- affected 70f3c073362ef7b5e55c92b83eb2dd9a7fb4e9bf – < 28de48a7cea495ab48082d9ff4ef63f7cb4e563a
- affected 70f3c073362ef7b5e55c92b83eb2dd9a7fb4e9bf – < 1854f53ccd88ad4e7568ddfafafffe71f1ceb0a6
- affected 2.6.38
- unaffected < 2.6.38
- unaffected 5.10.241 – ≤ 5.10.*
- unaffected 5.15.5 – ≤ 5.15.*
- unaffected 5.16 – ≤ *
References
References4
- https://git.kernel.org/stable/c/04c1af683270e4709a594bb1691b8800b945035a (opens in a new tab)
- https://git.kernel.org/stable/c/28de48a7cea495ab48082d9ff4ef63f7cb4e563a (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/1854f53ccd88ad4e7568ddfafafffe71f1ceb0a6 (opens in a new tab)x_transferred
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2021-33831 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2021-47183)Record last updated .