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CVE-2026-68141

HIGHCVSS 7.5/10EPSS 0.47%

Last modified

CVE-2026-68141 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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). EPSS estimates a 0.47% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
0.47%

38.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 3881ac441f642d56503818123446f7298442236b, < 6a1eb5b46c19073f8153b7e2c19b408cf353aaf1; >= 3881ac441f642d56503818123446f7298442236b, < c0b6e2ae90613c2fea7eaf3faa20985c6c2a1953; >= 3881ac441f642d56503818123446f7298442236b, < 07e21deb3664001995e0a456dd627ab7dbe127ec; >= 3881ac441f642d56503818123446f7298442236b, < 8bb111f87ded6acb9837ec9b45d6f02cda94c51f; >= 3881ac441f642d56503818123446f7298442236b, < 46453b16f38ec7147351f7447e2aec6ea330f7b3; >= 3881ac441f642d56503818123446f7298442236b, < 33736ff5e7c97d3348ce812e8bd2e125d840743c; >= 3881ac441f642d56503818123446f7298442236b, < 0e857185591fe79934427c9c0c1c31dc776be134; >= 3881ac441f642d56503818123446f7298442236b, < 47a5116e56a6b6fe1e909f244e39cd0fc26ceee4
LinuxLinux3.2

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-68141?
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.
How severe is CVE-2026-68141?
CVE-2026-68141 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.47% probability of exploitation in the next 30 days.
How do I fix CVE-2026-68141?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST