Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2026-68143

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net: slip: serialize receive against buffer reallocation sl_realloc_bufs() replaces rbuff and updates buffsize while holding sl…

Published Aug 10, 2026EPSS 0.14%

Overview

CVE-2026-68143 is a high-severity vulnerability. It was published on August 10, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

net: slip: serialize receive against buffer reallocation

sl_realloc_bufs() replaces rbuff and updates buffsize while holding

sl->lock. slip_receive_buf() reads those fields and writes through rbuff

without holding the lock.

An MTU change can therefore race with receive processing. An MTU shrink

can expose the new smaller rbuff with the old larger bound, causing an

out-of-bounds write. A receive callback which already loaded the old

rbuff can instead continue writing after that buffer has been freed.

Serialize receive processing with sl_realloc_bufs() by holding sl->lock

while consuming each receive batch.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/0e37bbd6d617eb52bace49390e99eaedc1af73ceRefgit.kernel.org/stable/c/189a550eb7e1dc10018718ddfc46d003ffe58653Refgit.kernel.org/stable/c/1be09d175b627fad7f6bec7ad27b8a4a99863912Refgit.kernel.org/stable/c/44401f7dd9940ced7098930ef64f5a332f279fc2Refgit.kernel.org/stable/c/5d07b178bef511d69558cfc89fe1129258dc39f8Refgit.kernel.org/stable/c/8180daf2b66155f84ec4f9e3f95488c8a3421716Refgit.kernel.org/stable/c/eb3836eab47487823f362e6985e170a1e15f20fdRefgit.kernel.org/stable/c/ee7f9bb9320add61f7b367d7e6cd55e3a3a4d65d

How CyberStrike helps

Frequently asked questions

What is CVE-2026-68143?

CVE-2026-68143 is a high-severity vulnerability. It was published on August 10, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-68143?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-68143?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-68143?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-68143 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related HIGH CVEs from 2026

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999