CVE-2026-45843slip: bound decode() reads against the compressed packet length
- 8.2HighCVSS base score
- 0.40%Exploitation in 30 daysEPSS · top 65% 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: slip: bound decode() reads against the compressed packet length slhc_uncompress() parses a VJ-compressed TCP header by advancing a pointer through the packet via decode() and pull16(). Neither helper bounds-checks against isize, and decode() masks its return with & 0xffff so it can never return the -1 that callers test for -- those error paths are dead code. A short compressed frame whose change byte requests optional fields lets decode() read past the end of the packet. The over-read bytes are folded into the cached cstate and reflected into subsequent reconstructed packets. Make decode() and pull16() take the packet end pointer and return -1 when exhausted. Add a bounds check before the TCP-checksum read. The existing == -1 tests now do what they were always meant to.
Timeline
ID reserved
By Linux
- 14 days later
· 14 days later
Published
- 5 months later
· 5 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 | High8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N |
| NVDNVD · Modified | 3.1 | High8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.40% · top 65% 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 8.2.
Affected products
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 6268f01ae989013671b526c883e92655342c6f6f
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 9aafba2f49e1fcccc2018816f5836a609c925879
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 335957df4ed60f02a2ec0432fbedbf0cc7241d8b
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 37537e42e6df387398bee85cb85070cc80bb1e10
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 4cefe32639933d652614b0bd50f818f9af4af78f
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 0511ecb00e61bf28e2fec4bb41fcce385c3a3b2d
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < d42bec6e4f6d6d658be365539400b3314b76b2a7
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 4c1367a2d7aad643a6f87c6931b13cc1a25e8ca7
- affected 2.6.12
- unaffected < 2.6.12
- unaffected 5.10.258 – ≤ 5.10.*
- unaffected 5.15.209 – ≤ 5.15.*
- unaffected 6.1.175 – ≤ 6.1.*
- unaffected 6.6.141 – ≤ 6.6.*
- unaffected 6.12.91 – ≤ 6.12.*
- unaffected 6.18.33 – ≤ 6.18.*
- unaffected 7.0.10 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References9
- https://git.kernel.org/stable/c/6268f01ae989013671b526c883e92655342c6f6f (opens in a new tab)
- https://git.kernel.org/stable/c/9aafba2f49e1fcccc2018816f5836a609c925879 (opens in a new tab)
- https://git.kernel.org/stable/c/335957df4ed60f02a2ec0432fbedbf0cc7241d8b (opens in a new tab)
- https://git.kernel.org/stable/c/37537e42e6df387398bee85cb85070cc80bb1e10 (opens in a new tab)
- https://git.kernel.org/stable/c/4cefe32639933d652614b0bd50f818f9af4af78f (opens in a new tab)
- https://git.kernel.org/stable/c/0511ecb00e61bf28e2fec4bb41fcce385c3a3b2d (opens in a new tab)
- https://git.kernel.org/stable/c/d42bec6e4f6d6d658be365539400b3314b76b2a7 (opens in a new tab)
- https://git.kernel.org/stable/c/4c1367a2d7aad643a6f87c6931b13cc1a25e8ca7 (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-784472.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-2026-32169 (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-2026-45843)Record last updated .