CVE-2026-80756 - selinux: do not cancel a policy conversion that never started

CVE-2026-80756 - selinux: do not cancel a policy conversion that never started

https://cvefeed.io/rssfeed/latest.atom / Thu, 09/03/2026 - 13:29
CVE ID :CVE-2026-80756
Published : Sept. 3, 2026, 8:26 a.m. | 2 hours, 37 minutes ago
Description :In the Linux kernel, the following vulnerability has been resolved: selinux: do not cancel a policy conversion that never started sel_write_load() calls selinux_policy_cancel() when sel_make_policy_nodes() fails, and that helper dereferences the outgoing policy to cancel its sidtab conversion. On the first policy load there is no outgoing policy: security_load_policy() returns early for that case, before it converts anything, and state->policy is still NULL. A first load that fails while building the selinuxfs tree therefore takes a NULL dereference in selinux_policy_cancel(), reached from a write(2) to /sys/fs/selinux/load. Skip the cancel when there is no old policy, mirroring the check security_load_policy() already makes before it converts.
Severity: 0.0 | NA
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