CVE-2026-45843
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().
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 8.2 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
- EPSS
- 0.40% probability · 34th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-126
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS 0.4% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://git.kernel.org/stable/c/0511ecb00e61bf28e2fec4bb41fcce385c3a3b2dPatch
- https://git.kernel.org/stable/c/335957df4ed60f02a2ec0432fbedbf0cc7241d8bPatch
- https://git.kernel.org/stable/c/37537e42e6df387398bee85cb85070cc80bb1e10Patch
- https://git.kernel.org/stable/c/4c1367a2d7aad643a6f87c6931b13cc1a25e8ca7Patch
- https://git.kernel.org/stable/c/4cefe32639933d652614b0bd50f818f9af4af78fPatch
- https://git.kernel.org/stable/c/6268f01ae989013671b526c883e92655342c6f6fPatch
- https://git.kernel.org/stable/c/9aafba2f49e1fcccc2018816f5836a609c925879Patch
- https://git.kernel.org/stable/c/d42bec6e4f6d6d658be365539400b3314b76b2a7Patch
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.