CVEvulnerability
CVE-2026-98422
- Status
- Received
- Published
- 2026-10-14
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Description
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: reset the AP_VLAN tailroom counter on ifdown
On ifup, AP_VLAN interfaces get crypto_tx_tailroom_needed_cnt from
the AP interface, but it's never decremented again unless the AP is
also brought down. Thus, bringing the same AP_VLAN up again will
increment the counter again and eventually hit the sanity check:
WARN_ON_ONCE(sdata->crypto_tx_tailroom_needed_cnt !=
master->crypto_tx_tailroom_needed_cnt);
Reset it on ifdown to avoid that.
References
- https://git.kernel.org/stable/c/304a874670a0b6ab5589a7f60b4af0251797b121 git.kernel.org
- https://git.kernel.org/stable/c/3d76b45e8432c0d75fcb9e90d92eaa3176898adf git.kernel.org
- https://git.kernel.org/stable/c/4504f3960dc4501c73be9f99eabda2e26e9db41e git.kernel.org
- https://git.kernel.org/stable/c/4b54d01b48445b66c9e576de92b90a3a3ae7b34a git.kernel.org
- https://git.kernel.org/stable/c/7775759e3cb35ef5a571b2d877c2a9b70a5d5f08 git.kernel.org
- https://git.kernel.org/stable/c/875835377d8d62c849b4eb03a7abfafa71d7668f git.kernel.org
- https://git.kernel.org/stable/c/b0b32d3f163d24ea7134380666193bf398e9dc0b git.kernel.org
- https://git.kernel.org/stable/c/f6b34a7d64324faf28eedc0f8678b0f832f1cc36 git.kernel.org