apparmor: fix race on rawdata dereference
Summary
| CVE | CVE-2026-23410 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-04-01 09:16:17 UTC |
| Updated | 2026-04-01 14:23:37 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: apparmor: fix race on rawdata dereference There is a race condition that leads to a use-after-free situation: because the rawdata inodes are not refcounted, an attacker can start open()ing one of the rawdata files, and at the same time remove the last reference to this rawdata (by removing the corresponding profile, for example), which frees its struct aa_loaddata; as a result, when seq_rawdata_open() is reached, i_private is a dangling pointer and freed memory is accessed. The rawdata inodes weren't refcounted to avoid a circular refcount and were supposed to be held by the profile rawdata reference. However during profile removal there is a window where the vfs and profile destruction race, resulting in the use after free. Fix this by moving to a double refcount scheme. Where the profile refcount on rawdata is used to break the circular dependency. Allowing for freeing of the rawdata once all inode references to the rawdata are put. |
Risk And Classification
EPSS: 0.000180000 probability, percentile 0.045290000 (date 2026-04-01)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 5d5182cae40115c03933989473288e54afb39c7c 6ef1f2926c41ab96952d9696d55a052f1b3a9418 git | Not specified |
| CNA | Linux | Linux | affected 5d5182cae40115c03933989473288e54afb39c7c f9761add6d100962a23996cb68f3d6abdd4d1815 git | Not specified |
| CNA | Linux | Linux | affected 5d5182cae40115c03933989473288e54afb39c7c af782cc8871e3683ddd5a3cd2f7df526599863a9 git | Not specified |
| CNA | Linux | Linux | affected 5d5182cae40115c03933989473288e54afb39c7c 763e838adc3c7ec5a7df2990ce84cad951e42721 git | Not specified |
| CNA | Linux | Linux | affected 5d5182cae40115c03933989473288e54afb39c7c a0b7091c4de45a7325c8780e6934a894f92ac86b git | Not specified |
| CNA | Linux | Linux | affected 4.13 | Not specified |
| CNA | Linux | Linux | unaffected 4.13 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.130 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.77 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.18 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.19.8 6.19.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0-rc4 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/a0b7091c4de45a7325c8780e6934a894f92ac86b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/af782cc8871e3683ddd5a3cd2f7df526599863a9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/6ef1f2926c41ab96952d9696d55a052f1b3a9418 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/f9761add6d100962a23996cb68f3d6abdd4d1815 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/763e838adc3c7ec5a7df2990ce84cad951e42721 | 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.