{"cve":"CVE-2026-68143","nvd":{"published":"2026-08-10T13:20:00.047","modified":"2026-10-19T21:17:54.240","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: slip: serialize receive against buffer reallocation\n\nsl_realloc_bufs() replaces rbuff and updates buffsize while holding\nsl->lock. slip_receive_buf() reads those fields and writes through rbuff\nwithout holding the lock.\n\nAn MTU change can therefore race with receive processing. An MTU shrink\ncan expose the new smaller rbuff with the old larger bound, causing an\nout-of-bounds write. A receive callback which already loaded the old\nrbuff can instead continue writing after that buffer has been freed.\n\nSerialize receive processing with sl_realloc_bufs() by holding sl->lock\nwhile consuming each receive batch.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-362"],"references":["https://git.kernel.org/stable/c/0e37bbd6d617eb52bace49390e99eaedc1af73ce","https://git.kernel.org/stable/c/189a550eb7e1dc10018718ddfc46d003ffe58653","https://git.kernel.org/stable/c/1be09d175b627fad7f6bec7ad27b8a4a99863912","https://git.kernel.org/stable/c/44401f7dd9940ced7098930ef64f5a332f279fc2","https://git.kernel.org/stable/c/5d07b178bef511d69558cfc89fe1129258dc39f8"],"products":[],"source":"nvd","synced_at":"2026-10-21T03:56:58.798400159+00:00"},"epss":{"cve":"CVE-2026-68143","score":0.00107,"percentile":0.01167,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}