CVE-2026-46212 Details
Description
In the Linux kernel, the following vulnerability has been resolved: batman-adv: bla: prevent use-after-free when deleting claims 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.
A use-after-free vulnerability has been addressed in the Linux kernel's batman-adv module. The issue arises in the 'bridge_loop_avoidance' component when the function 'batadv_bla_del_backbone_claims()' removes claims for a backbone. The vulnerability occurs because the function deletes the link entry from the hash list, which is a reference that needs to be released. If the reference is dropped before the last access to the claim object, the claim can be prematurely freed, leading to a use-after-free condition.
Users can apply the latest patches available in the Linux kernel stable tree to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/00155f336a5e8b1006d2ca9ae7ad8fc4a44bb401 | kernel.org | Patch |
| https://git.kernel.org/stable/c/0cc9847c64cb6e61118bc78c9187c8209a7197fa | kernel.org | Patch |
| https://git.kernel.org/stable/c/1d4b241482d9025c537afb3c7c8419c72c0e0c82 | kernel.org | Patch |
| https://git.kernel.org/stable/c/368449e467d5f1e2c2e987bf2bd57000ba75e10b | kernel.org | Patch |
| https://git.kernel.org/stable/c/4ae1709a314060a196981b344610d023ea841e57 | kernel.org | Patch |
| https://git.kernel.org/stable/c/6c5dc6d68e6ba7f0224a757a39ed52fcdb54d472 | kernel.org | Patch |
| https://git.kernel.org/stable/c/a1a99837bb6169cfb9187abaa2005e8f12079426 | kernel.org | Patch |
| https://git.kernel.org/stable/c/b88c865dcf6e9f20bfe66a360d4b62941ef769b8 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 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 rc1 7.1 rc2 7.1 rc3 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 10, 2026 | Initial Analysis | [email protected] |
| Jun 1, 2026 | CVE Modified | kernel.org |
| May 30, 2026 | CVE Modified | kernel.org |
| May 28, 2026 | New CVE Received | kernel.org |