CVE-2026-93795
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
blk-cgroup: fix leaks and online flag on radix_tree_insert failure
In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: fix leaks and online flag on radix_tree_insert failure When radix_tree_insert() fails in blkg_create(), the error path has two issues: 1. blkg->online is set to true unconditionally, even when the blkg was never fully inserted. Move the assignment inside the success block. 2. The error path calls blkg_put() without first calling percpu_ref_kill(). Because the refcount is still in percpu mode, percpu_ref_put() only does this_cpu_sub() without checking for zero, so blkg_release() is never triggered. This permanently leaks the blkg memory, its percpu iostat, policy data, the parent blkg reference, and the cgroup css reference — the latter preventing the cgroup from ever being destroyed. Fix by replacing blkg_put() with percpu_ref_kill(), matching the pattern used in blkg_destroy().
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 7fcf2b033b84e261dca283bc2911aaea4b07b525 | affected | git | 0f840db042caee9d2f3dcdcf97d6674f6e4c1e30 | Unavailable | None listed |
| 7fcf2b033b84e261dca283bc2911aaea4b07b525 | affected | git | f53945d7c712efe63fadbcc5ffed6370871fd0d3 | Unavailable | None listed |
| 7fcf2b033b84e261dca283bc2911aaea4b07b525 | affected | git | ada8270ccdb6f212da5eb22614c28ea418746a4a | Unavailable | None listed |
| 7fcf2b033b84e261dca283bc2911aaea4b07b525 | affected | git | c3650be82ef6e7af13b79b2d10a7363bdf54aa7f | Unavailable | None listed |
| 7fcf2b033b84e261dca283bc2911aaea4b07b525 | affected | git | 6e85f02d45b5977c0326a8d854c6db878aa6b34a | Unavailable | None listed |
| 7fcf2b033b84e261dca283bc2911aaea4b07b525 | affected | git | 4c0d150fb98ea40760611979f4e664c244b20966 | Unavailable | None listed |
| 7fcf2b033b84e261dca283bc2911aaea4b07b525 | affected | git | dbbca20764382b4d411ec2918f4e278ffe547acc | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.0 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.0 | Unavailable | None listed |
| 5.10.271 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.222 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.189 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.158 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.111 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.53 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |