xen-blkback: Avoid UAF when reading I/O statistics
Summary
| CVE | CVE-2026-100082 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-11-06 19:17:03 UTC |
| Updated | 2026-11-06 19:17:03 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: xen-blkback: Avoid UAF when reading I/O statistics Reading I/O statistics via sysfs concurrently with tearing down a frontend device might result in UAF or a NULL dereference, as the reading of the statistics data is not synchronized with freeing the data. Use a rwlock for synchronizing. This is XSA-528 / CVE-2026-100082 |
Risk And Classification
EPSS: 0.002440000 probability, percentile 0.156870000 (date 2026-11-08)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 253cff0526781e28b1b0f9fdacd74ecdc23d3ab7 git | Not specified |
| CNA | Linux | Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 2c9ccbe0ffcff3615c7ad917c49b67571a41f21c git | Not specified |
| CNA | Linux | Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 58ba056991dbcec8a75e6861cb4479ac947b69e6 git | Not specified |
| CNA | Linux | Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 fe9ead8c5bdb752e329cecfecbdb5dfca5e9996b git | Not specified |
| CNA | Linux | Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 b764e17313534794aeb99c901869f213e36a16ef git | Not specified |
| CNA | Linux | Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 c49934da934cf495faf782aa5d84f413221c9be6 git | Not specified |
| CNA | Linux | Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 b0378161c28e77e4d0e2eda3c9433ab4394d2a2f git | Not specified |
| CNA | Linux | Linux | affected 5.10.274 semver | Not specified |
| CNA | Linux | Linux | affected 5.15.225 semver | Not specified |
| CNA | Linux | Linux | affected 6.1.192 semver | Not specified |
| CNA | Linux | Linux | affected 6.6.162 semver | Not specified |
| CNA | Linux | Linux | affected 6.12.116 semver | Not specified |
| CNA | Linux | Linux | affected 6.18.62 semver | Not specified |
| CNA | Linux | Linux | affected 7.3.3 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.274 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.225 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.192 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.162 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.116 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.62 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3.3 7.3.* semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/b0378161c28e77e4d0e2eda3c9433ab4394d2a2f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| www.openwall.com/lists/oss-security/2026/11/06/11 | af854a3a-2127-422b-91ae-364da2661108 | www.openwall.com | |
| git.kernel.org/stable/c/58ba056991dbcec8a75e6861cb4479ac947b69e6 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/253cff0526781e28b1b0f9fdacd74ecdc23d3ab7 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/2c9ccbe0ffcff3615c7ad917c49b67571a41f21c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| xenbits.xen.org/xsa/advisory-528.html | af854a3a-2127-422b-91ae-364da2661108 | xenbits.xen.org | |
| git.kernel.org/stable/c/fe9ead8c5bdb752e329cecfecbdb5dfca5e9996b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/c49934da934cf495faf782aa5d84f413221c9be6 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/b764e17313534794aeb99c901869f213e36a16ef | 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.