asymmetric_keys: reject trust keys without IDs
Summary
| CVE | CVE-2026-99220 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-11-02 16:17:46 UTC |
| Updated | 2026-11-03 20:18:27 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: asymmetric_keys: reject trust keys without IDs The PKCS#8 parser deliberately leaves the asym_key_ids payload slot empty. key_or_keyring_common() unconditionally dereferences that slot when a PKCS#8 key is supplied to a key_or_keyring restriction. Both the plain and :chain forms reach this branch, allowing an unprivileged caller to trigger a NULL pointer dereference through KEYCTL_RESTRICT_KEYRING followed by add_key(). Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000 KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] RIP: 0010:key_or_keyring_common (crypto/asymmetric_keys/restrict.c:205 crypto/asymmetric_keys/restrict.c:279) Call Trace: <TASK> __key_create_or_update (security/keys/key.c:884) key_create_or_update (security/keys/key.c:1021) __do_sys_add_key (security/keys/keyctl.c:134) do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) </TASK> Kernel panic - not syncing: Fatal exception Reject an asymmetric restriction key without key IDs. A PKCS#8 private key cannot identify the signer of a candidate certificate and is not a valid trust anchor. |
Risk And Classification
EPSS: 0.001150000 probability, percentile 0.015650000 (date 2026-11-03)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 3c58b2362ba828ee2970c66c6a6fd7b04fde4413 889a2293a95f6c2880bf73b67f9b0af23251a128 git | Not specified |
| CNA | Linux | Linux | affected 3c58b2362ba828ee2970c66c6a6fd7b04fde4413 7f0728ba89624e25df2bb80ff59bbfb545060935 git | Not specified |
| CNA | Linux | Linux | affected 3c58b2362ba828ee2970c66c6a6fd7b04fde4413 2a40bdd4409567de4c2a141ac66439dc238af752 git | Not specified |
| CNA | Linux | Linux | affected 3c58b2362ba828ee2970c66c6a6fd7b04fde4413 1aa0c7aa4c2554a5b6d74ae1924508ca4718234b git | Not specified |
| CNA | Linux | Linux | affected 3c58b2362ba828ee2970c66c6a6fd7b04fde4413 33a078f04e264eb71aa9f209cb334e4010123818 git | Not specified |
| CNA | Linux | Linux | affected 3c58b2362ba828ee2970c66c6a6fd7b04fde4413 57e54b6939c6539d90a81c7e57531901d5991651 git | Not specified |
| CNA | Linux | Linux | affected 3c58b2362ba828ee2970c66c6a6fd7b04fde4413 9695df3b1db4ac4534274d38ee16e3b9b0bf910e git | Not specified |
| CNA | Linux | Linux | affected 4.20 | Not specified |
| CNA | Linux | Linux | unaffected 4.20 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.191 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.161 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.115 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.60 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.14 7.2.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3.1 7.3.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.4-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/7f0728ba89624e25df2bb80ff59bbfb545060935 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/9695df3b1db4ac4534274d38ee16e3b9b0bf910e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/1aa0c7aa4c2554a5b6d74ae1924508ca4718234b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/2a40bdd4409567de4c2a141ac66439dc238af752 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/33a078f04e264eb71aa9f209cb334e4010123818 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/57e54b6939c6539d90a81c7e57531901d5991651 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/889a2293a95f6c2880bf73b67f9b0af23251a128 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.