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.
Fix
Microsoft's update · Low
- Release Notes — azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 · build 6.6.159.1-1
From the 2026-Oct release note of Microsoft's Security Update Guide, revised 2026-10-29.
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 2
- StatusReceived → PublishedNVD modified 2026-10-19 09:19
- First seenunscoredNVD modified 2026-10-14 14:17
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.
References 8
- https://git.kernel.org/stable/c/304a874670a0b6ab5589a7f60b4af0251797b121
- https://git.kernel.org/stable/c/3d76b45e8432c0d75fcb9e90d92eaa3176898adf
- https://git.kernel.org/stable/c/4504f3960dc4501c73be9f99eabda2e26e9db41e
- https://git.kernel.org/stable/c/4b54d01b48445b66c9e576de92b90a3a3ae7b34a
- https://git.kernel.org/stable/c/7775759e3cb35ef5a571b2d877c2a9b70a5d5f08
- https://git.kernel.org/stable/c/875835377d8d62c849b4eb03a7abfafa71d7668f
- https://git.kernel.org/stable/c/b0b32d3f163d24ea7134380666193bf398e9dc0b
- https://git.kernel.org/stable/c/f6b34a7d64324faf28eedc0f8678b0f832f1cc36