Description
In the Linux kernel, the following vulnerability has been resolved: ax25: properly unshare skbs in ax25_kiss_rcv() Bernard Pidoux reported a regression apparently caused by commit c353e8983e0d ("net: introduce per netns packet chains"). skb->dev becomes NULL and we crash in __netif_receive_skb_core(). Before above commit, different kind of bugs or corruptions could happen without a major crash. But the root cause is that ax25_kiss_rcv() can queue/mangle input skb without checking if this skb is shared or not. Many thanks to Bernard Pidoux for his help, diagnosis and tests. We had a similar issue years ago fixed with commit 7aaed57c5c28 ("phonet: properly unshare skbs in phonet_rcv()").
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 42b46684e2c78ee052d8c2ee8d9c2089233c9094affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 5b079be1b9da49ad88fc304c874d4be7085f7883affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 2bd0f67212908243ce88e35bf69fa77155b47b14affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 01a2984cb803f2d487b7074f9718db2bf3531f69affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 7d449b7a6c8ee434d10a483feed7c5c50108cf56affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 89064cf534bea4bb28c83fe6bbb26657b19dd5feaffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < b1c71d674a308d2fbc83efcf88bfc4217a86aa17affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 8156210d36a43e76372312c87eb5ea3dbb405a85affected
Linux Linux
Default version status: affected
2.6.12affected0 to < 2.6.12unaffected5.4.299 to ≤ 5.4.*unaffected5.10.243 to ≤ 5.10.*unaffected5.15.192 to ≤ 5.15.*unaffected6.1.151 to ≤ 6.1.*unaffected6.6.105 to ≤ 6.6.*unaffected6.12.46 to ≤ 6.12.*unaffected6.16.6 to ≤ 6.16.*unaffected6.17 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/42b46684e2c78ee052d8c2ee8d9c2089233c9094 ↗
- https://git.kernel.org/stable/c/5b079be1b9da49ad88fc304c874d4be7085f7883 ↗
- https://git.kernel.org/stable/c/2bd0f67212908243ce88e35bf69fa77155b47b14 ↗
- https://git.kernel.org/stable/c/01a2984cb803f2d487b7074f9718db2bf3531f69 ↗
- https://git.kernel.org/stable/c/7d449b7a6c8ee434d10a483feed7c5c50108cf56 ↗
- https://git.kernel.org/stable/c/89064cf534bea4bb28c83fe6bbb26657b19dd5fe ↗
- https://git.kernel.org/stable/c/b1c71d674a308d2fbc83efcf88bfc4217a86aa17 ↗
- https://git.kernel.org/stable/c/8156210d36a43e76372312c87eb5ea3dbb405a85 ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html ↗