CVE-2026-80756
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.
How to fix
- Linux Linux2d29983104f06f5b0babcd5a25a0f0408272cd27, a4f182f8715cb0819445f0850cd5436828f4bafc, 1059789ae9f99cbbe3a78e361e9c0976beb5958b, 1acc317d67a755a45e32419a15d70e403fa43f0e, a42932c6aa33d0aac683cacdf1ec7009b955ba5d, 1b4ff94ae7c580c880291519fb0e3e2bd075beef, 219c96de5d9b6b4af7e8576ad897b774cc3ee9a7, e5c0235a3c4e9eb047a16cd02323fe4ecf2f570e or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 ≤ v < 2d29983104f06f5b0babcd5a25a0f0408272cd27, 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 ≤ v < a4f182f8715cb0819445f0850cd5436828f4bafc, 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 ≤ v < 1059789ae9f99cbbe3a78e361e9c0976beb5958b, 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 ≤ v < 1acc317d67a755a45e32419a15d70e403fa43f0e, 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 ≤ v < a42932c6aa33d0aac683cacdf1ec7009b955ba5d, 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 ≤ v < 1b4ff94ae7c580c880291519fb0e3e2bd075beef, 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 ≤ v < 219c96de5d9b6b4af7e8576ad897b774cc3ee9a7, 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 ≤ v < e5c0235a3c4e9eb047a16cd02323fe4ecf2f570e, 5.10 | 2d29983104f06f5b0babcd5a25a0f0408272cd27, a4f182f8715cb0819445f0850cd5436828f4bafc, 1059789ae9f99cbbe3a78e361e9c0976beb5958b, 1acc317d67a755a45e32419a15d70e403fa43f0e, a42932c6aa33d0aac683cacdf1ec7009b955ba5d, 1b4ff94ae7c580c880291519fb0e3e2bd075beef, 219c96de5d9b6b4af7e8576ad897b774cc3ee9a7, e5c0235a3c4e9eb047a16cd02323fe4ecf2f570e |
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