BUG: Address NUM::NUM on device lo is missing its host route.

Status: moderation: reported on 2026/08/23 01:19
Labels: prio:normal
[Documentation on labels]
Reported-by: syzbot+c75e631dcc2f1dd5592d@syzkaller.appspotmail.com
First crash: 4d08h, last: 4d08h
▶ ▼ ✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision
9fbf8f72 assessment-security DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ✅ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ BUG: Address NUM::NUM on device lo is missing its host route. 2026/08/21 00:00 2026/08/21 00:00 2026/08/21 00:59 1e72964b
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.6 BUG: Address NUM::NUM on device lo is missing its host route. -1 1 17d 17d 0/2 upstream: reported on 2026/08/05 22:54

Sample crash report:
IPv6: BUG: Address 2001::1 on device lo is missing its host route.

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/19 01:08 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: Address NUM::NUM on device lo is missing its host route.
2026/08/19 01:08 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: Address NUM::NUM on device lo is missing its host route.
* Struck through repros no longer work on HEAD.