CVE-2026-68141net/af_iucv: fix NULL deref in afiucv_hs_callback_syn()
- 7.5HighCVSS base score
- 0.52%Exploitation in 30 daysEPSS · top 55% 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: net/af_iucv: fix NULL deref in afiucv_hs_callback_syn() afiucv_hs_callback_syn() allocates the child socket with GFP_ATOMIC. If the allocation fails, nsk is NULL. The connection-refused path is entered when the listen state check fails, the accept backlog is full, or nsk is NULL. The code unconditionally calls iucv_sock_kill(nsk) in that path. iucv_sock_kill() does not accept a NULL socket pointer and immediately dereferences sk via sock_flag(sk, SOCK_ZAPPED). When nsk is NULL, calling iucv_sock_kill(nsk) results in a NULL pointer dereference. Only call iucv_sock_kill() when a child socket was successfully allocated.
Timeline
ID reserved
By Linux
- 11 days later
· 11 days later
Published
- 2 months later
· 2 months 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 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Received | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.52% · top 55% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
- affected 3881ac441f642d56503818123446f7298442236b – < 6a1eb5b46c19073f8153b7e2c19b408cf353aaf1
- affected 3881ac441f642d56503818123446f7298442236b – < c0b6e2ae90613c2fea7eaf3faa20985c6c2a1953
- affected 3881ac441f642d56503818123446f7298442236b – < 07e21deb3664001995e0a456dd627ab7dbe127ec
- affected 3881ac441f642d56503818123446f7298442236b – < 8bb111f87ded6acb9837ec9b45d6f02cda94c51f
- affected 3881ac441f642d56503818123446f7298442236b – < 46453b16f38ec7147351f7447e2aec6ea330f7b3
- affected 3881ac441f642d56503818123446f7298442236b – < 33736ff5e7c97d3348ce812e8bd2e125d840743c
- affected 3881ac441f642d56503818123446f7298442236b – < 0e857185591fe79934427c9c0c1c31dc776be134
- affected 3881ac441f642d56503818123446f7298442236b – < 47a5116e56a6b6fe1e909f244e39cd0fc26ceee4
- affected 3.2
- unaffected < 3.2
- unaffected 5.10.265 – ≤ 5.10.*
- unaffected 5.15.216 – ≤ 5.15.*
- unaffected 6.1.183 – ≤ 6.1.*
- unaffected 6.6.148 – ≤ 6.6.*
- unaffected 6.12.101 – ≤ 6.12.*
- unaffected 6.18.42 – ≤ 6.18.*
- unaffected 7.1.6 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/6a1eb5b46c19073f8153b7e2c19b408cf353aaf1 (opens in a new tab)
- https://git.kernel.org/stable/c/c0b6e2ae90613c2fea7eaf3faa20985c6c2a1953 (opens in a new tab)
- https://git.kernel.org/stable/c/07e21deb3664001995e0a456dd627ab7dbe127ec (opens in a new tab)
- https://git.kernel.org/stable/c/8bb111f87ded6acb9837ec9b45d6f02cda94c51f (opens in a new tab)
- https://git.kernel.org/stable/c/46453b16f38ec7147351f7447e2aec6ea330f7b3 (opens in a new tab)
- https://git.kernel.org/stable/c/33736ff5e7c97d3348ce812e8bd2e125d840743c (opens in a new tab)
- https://git.kernel.org/stable/c/0e857185591fe79934427c9c0c1c31dc776be134 (opens in a new tab)
- https://git.kernel.org/stable/c/47a5116e56a6b6fe1e909f244e39cd0fc26ceee4 (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-2026-55523 (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)
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[](https://cveledger.app/cve/CVE-2026-68141)Record last updated .