Description
An issue was discovered in the Linux kernel before 4.14.16. There is a use-after-free in net/sctp/socket.c for a held lock after a peel off, aka CID-a0ff660058b8.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 4.14.17-1 | — |
| Debian 13 | linux | 4.14.17-1 | — |
| Debian 12 | linux | 4.14.17-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +13 | No fix yet | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | linux +3 | No fix yet | — |
References
- https://syzkaller.appspot.com/bug?id=a8d38d1b68ffc744c53bd9b9fc1dbd6c86b1afe2
- https://sites.google.com/view/syzscope/warning-held-lock-freed
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a0ff660058b88d12625a783ce9e5c1371c87951f
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.16
- https://security.netapp.com/advisory/ntap-20210720-0002/