CVE-2026-80756

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < 2d29983104f06f5b0babcd5a25a0f0408272cd27affected
LinuxLinux02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < a4f182f8715cb0819445f0850cd5436828f4bafcaffected
LinuxLinux02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < 1059789ae9f99cbbe3a78e361e9c0976beb5958baffected
LinuxLinux02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < 1acc317d67a755a45e32419a15d70e403fa43f0eaffected
LinuxLinux02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < a42932c6aa33d0aac683cacdf1ec7009b955ba5daffected
LinuxLinux02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < 1b4ff94ae7c580c880291519fb0e3e2bd075beefaffected
LinuxLinux02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < 219c96de5d9b6b4af7e8576ad897b774cc3ee9a7affected
LinuxLinux02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < e5c0235a3c4e9eb047a16cd02323fe4ecf2f570eaffected
LinuxLinux5.10affected
LinuxLinux0 < 5.10unaffected
LinuxLinux5.10.266 <= 5.10.*unaffected
LinuxLinux5.15.217 <= 5.15.*unaffected
LinuxLinux6.1.184 <= 6.1.*unaffected
LinuxLinux6.6.153 <= 6.6.*unaffected
LinuxLinux6.12.105 <= 6.12.*unaffected
LinuxLinux6.18.46 <= 6.18.*unaffected
LinuxLinux7.1.10 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References