Description
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 products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
23721387c409087fd3b97e274f34d3ddc0970b74 to < 5202f071b367ffbc8e279fc7a00db14f5e587f52affected23721387c409087fd3b97e274f34d3ddc0970b74 to < 69d1ce9c72eca91203ffdb8d08bacd511100aec6affected23721387c409087fd3b97e274f34d3ddc0970b74 to < f4858832ddef2f39f21e30b7226bbcd3c4b2bc96affected23721387c409087fd3b97e274f34d3ddc0970b74 to < 2f55b58b5a0bbed192d60c444a45a49cdf1b545faffected23721387c409087fd3b97e274f34d3ddc0970b74 to < 7962b522222628596ca9ecc8722efc95367aadbdaffected23721387c409087fd3b97e274f34d3ddc0970b74 to < 4dee4c0688443aaf5bbec74aa203c851d1d53c35affected23721387c409087fd3b97e274f34d3ddc0970b74 to < 1f2dc36c297d27733f1b380ea644cf15a361bd7baffected23721387c409087fd3b97e274f34d3ddc0970b74 to < 82d8701b2c930d0e96b0dbc9115a218d791cb0d2affected
Linux Linux
Default version status: affected
3.5affected0 to < 3.5unaffected5.10.258 to ≤ 5.10.*unaffected5.15.209 to ≤ 5.15.*unaffected6.1.169 to ≤ 6.1.*unaffected6.6.135 to ≤ 6.6.*unaffected6.12.82 to ≤ 6.12.*unaffected6.18.23 to ≤ 6.18.*unaffected6.19.13 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
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 ↗