CVE-2026-46212
Analyzed
Analyzed - Analysis Complete
Use-After-Free in Linux Kernel batman-adv BLA
Publication date: 2026-05-28
Last updated on: 2026-06-10
Assigner: kernel.org
Description
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.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | From 5.16 (inc) to 6.1.175 (exc) |
| linux | linux_kernel | From 5.11 (inc) to 5.15.209 (exc) |
| linux | linux_kernel | From 6.2 (inc) to 6.6.140 (exc) |
| linux | linux_kernel | From 6.13 (inc) to 6.18.32 (exc) |
| linux | linux_kernel | From 6.7 (inc) to 6.12.90 (exc) |
| linux | linux_kernel | From 6.19 (inc) to 7.0.9 (exc) |
| linux | linux_kernel | From 3.5 (inc) to 5.10.258 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-416 | The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. |
