CVE-2026-45843
published 2026-05-27CVE-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…
high8.2CVSS 3.1
AVNACLPRNUINSUCHILAN
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.
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6268f01ae989013671b526c883e92655342c6f6f | 6268f01ae989013671b526c883e92655342c6f6f |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9aafba2f49e1fcccc2018816f5836a609c925879 | 9aafba2f49e1fcccc2018816f5836a609c925879 |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 335957df4ed60f02a2ec0432fbedbf0cc7241d8b | 335957df4ed60f02a2ec0432fbedbf0cc7241d8b |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 37537e42e6df387398bee85cb85070cc80bb1e10 | 37537e42e6df387398bee85cb85070cc80bb1e10 |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4cefe32639933d652614b0bd50f818f9af4af78f | 4cefe32639933d652614b0bd50f818f9af4af78f |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 0511ecb00e61bf28e2fec4bb41fcce385c3a3b2d | 0511ecb00e61bf28e2fec4bb41fcce385c3a3b2d |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < d42bec6e4f6d6d658be365539400b3314b76b2a7 | d42bec6e4f6d6d658be365539400b3314b76b2a7 |
| linux | linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4c1367a2d7aad643a6f87c6931b13cc1a25e8ca7 | 4c1367a2d7aad643a6f87c6931b13cc1a25e8ca7 |
| linux | linux_kernel | — | — |