batman-adv: bla: prevent use-after-free when deleting claims
Published May 28, 2026
8.8
HIGHCVSS 3.1
EPSS 0.40%
Description
When batadv_bla_del_backbone_claims() removes all claims for a backbone, it does this by dropping the link entry in the hash list. This list entry itself was one of the references which need to be dropped at the same time via batadv_claim_put().
But the batadv_claim_put() must not be done before the last access to the claim object in this function. Otherwise the claim might be freed already by the batadv_claim_release() function before the list entry was dropped.
Affected products
-
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version
-
- Version 3.5StatusaffectedConstraints-
- Version 0StatusunaffectedConstraints<3.5
- Version 5.10.258StatusunaffectedConstraints<=5.10.*
- Version 5.15.209StatusunaffectedConstraints<=5.15.*
- Version 6.1.175StatusunaffectedConstraints<=6.1.*
- Version 6.12.90StatusunaffectedConstraints<=6.12.*
- Version 6.18.32StatusunaffectedConstraints<=6.18.*
- Version 6.6.140StatusunaffectedConstraints<=6.6.*
- Version 7.0.9StatusunaffectedConstraints<=7.0.*
- Version 7.1StatusunaffectedConstraints<=*
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux | unaffected |
| |||||||||||||||||||||||||||||||||
| Linux | Linux | affected |
|
- ≥ 3.5 · < 5.10.258
- ≥ 5.11 · < 5.15.209
- ≥ 5.16 · < 6.1.175
- ≥ 6.2 · < 6.6.140
- ≥ 6.7 · < 6.12.90
- ≥ 6.13 · < 6.18.32
- ≥ 6.19 · < 7.0.9
- 7.1
- 7.1
- 7.1
No data.
Red Hat Enterprise Linux 10
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise Linux 8
kernel-rt
Not affected
Red Hat Enterprise Linux 9
kernel
Not affected
Red Hat Enterprise Linux 9
kernel-rt
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
References (13)
- https://access.redhat.com/security/cve/CVE-2026-46212 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2482632 Issue Tracking
- https://git.kernel.org/stable/c/00155f336a5e8b1006d2ca9ae7ad8fc4a44bb401 Patch
- https://git.kernel.org/stable/c/0cc9847c64cb6e61118bc78c9187c8209a7197fa Patch
- https://git.kernel.org/stable/c/1d4b241482d9025c537afb3c7c8419c72c0e0c82 Patch
- https://git.kernel.org/stable/c/368449e467d5f1e2c2e987bf2bd57000ba75e10b Patch
- https://git.kernel.org/stable/c/4ae1709a314060a196981b344610d023ea841e57 Patch
- https://git.kernel.org/stable/c/6c5dc6d68e6ba7f0224a757a39ed52fcdb54d472 Patch
- https://git.kernel.org/stable/c/a1a99837bb6169cfb9187abaa2005e8f12079426 Patch
- https://git.kernel.org/stable/c/b88c865dcf6e9f20bfe66a360d4b62941ef769b8 Patch
- https://lore.kernel.org/linux-cve-announce/2026052835-CVE-2026-46212-2bca@gregkh/T
- https://nvd.nist.gov/vuln/detail/CVE-2026-46212
- https://www.cve.org/CVERecord?id=CVE-2026-46212
Change history (0)
No recorded changes yet.