Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: batman-adv: hold claim backbone gateways by reference batadv_bla_add_claim() can replace claim->backbone_gw and drop the old gateway's last reference while readers still follow the pointer. The netlink claim dump path dereferences claim->backbone_gw->orig and takes claim->backbone_gw->crc_lock without pinning the underlying backbone gateway. batadv_bla_check_claim() still has the same naked pointer access pattern. Reuse batadv_bla_claim_get_backbone_gw() in both readers so they operate on a stable gateway reference until the read-side work is complete. This keeps the dump and claim-check paths aligned with the lifetime rules introduced for the other BLA claim readers.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 23721387c409087fd3b97e274f34d3ddc0970b74 before 5202f071b367ffbc8e279fc7a00db14f5e587f52; affected 23721387c409087fd3b97e274f34d3ddc0970b74 before 69d1ce9c72eca91203ffdb8d08bacd511100aec6; affected 23721387c409087fd3b97e274f34d3ddc0970b74 before f4858832ddef2f39f21e30b7226bbcd3c4b2bc96; affected 23721387c409087fd3b97e274f34d3ddc0970b74 before 2f55b58b5a0bbed192d60c444a45a49cdf1b545f; affected 23721387c409087fd3b97e274f34d3ddc0970b74 before 7962b522222628596ca9ecc8722efc95367aadbd; affected 23721387c409087fd3b97e274f34d3ddc0970b74 before 4dee4c0688443aaf5bbec74aa203c851d1d53c35; affected 23721387c409087fd3b97e274f34d3ddc0970b74 before 1f2dc36c297d27733f1b380ea644cf15a361bd7b; affected 23721387c409087fd3b97e274f34d3ddc0970b74 before 82d8701b2c930d0e96b0dbc9115a218d791cb0d2 |
| Linux / Linux | affected 3.5; unaffected 0 before 3.5; unaffected 5.10.258 through 5.10.*; unaffected 5.15.209 through 5.15.*; unaffected 6.1.169 through 6.1.*; unaffected 6.6.135 through 6.6.*; unaffected 6.12.82 through 6.12.*; unaffected 6.18.23 through 6.18.*; unaffected 6.19.13 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/5202f071b367ffbc8e279fc7a00db14f5e587f52
- https://git.kernel.org/stable/c/69d1ce9c72eca91203ffdb8d08bacd511100aec6
- https://git.kernel.org/stable/c/f4858832ddef2f39f21e30b7226bbcd3c4b2bc96
- https://git.kernel.org/stable/c/2f55b58b5a0bbed192d60c444a45a49cdf1b545f
- https://git.kernel.org/stable/c/7962b522222628596ca9ecc8722efc95367aadbd
- https://git.kernel.org/stable/c/4dee4c0688443aaf5bbec74aa203c851d1d53c35
- https://git.kernel.org/stable/c/1f2dc36c297d27733f1b380ea644cf15a361bd7b
- https://git.kernel.org/stable/c/82d8701b2c930d0e96b0dbc9115a218d791cb0d2
ADP enrichment
No English description supplied.
No references supplied.