CVE-2026-23444
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: always free skb on ieee80211_tx_prepare_skb() failure
ieee80211_tx_prepare_skb() has three error paths, but only two of them free the skb. The first error path (ieee80211_tx_prepare() returning TX_DROP) does not free it, while invoke_tx_handlers() failure and the fragmentation check both do.
Add kfree_skb() to the first error path so all three are consistent, and remove the now-redundant frees in callers (ath9k, mt76, mac80211_hwsim) to avoid double-free.
Document the skb ownership guarantee in the function's kdoc.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 06be6b149f7e406bcf16098567f5a6c9f042bced < 905ef207d5ed99ca64adfe39fba9ac46e434327a | affected |
| Linux | Linux | 06be6b149f7e406bcf16098567f5a6c9f042bced < 5ef8ca1c164786da24169af155c1ca1ff1353cf8 | affected |
| Linux | Linux | 06be6b149f7e406bcf16098567f5a6c9f042bced < 9a779d1f480e83720b5384adf165604e7ee226bd | affected |
| Linux | Linux | 06be6b149f7e406bcf16098567f5a6c9f042bced < f77b51bcee7be2bb686b5f7a2d4a1921e4bdb9f4 | affected |
| Linux | Linux | 06be6b149f7e406bcf16098567f5a6c9f042bced < 3b4d27acafaeab478fd24f79ad6e593a892828b9 | affected |
| Linux | Linux | 06be6b149f7e406bcf16098567f5a6c9f042bced < 06e769dddcbeb3baf2ce346273b53dd61fdbecf4 | affected |
| Linux | Linux | 06be6b149f7e406bcf16098567f5a6c9f042bced < 50f1b690b4868923fbd242298def2fb88662f108 | affected |
| Linux | Linux | 06be6b149f7e406bcf16098567f5a6c9f042bced < d5ad6ab61cbd89afdb60881f6274f74328af3ee9 | affected |
| Linux | Linux | 3.13 | affected |
| Linux | Linux | 0 < 3.13 | unaffected |
| Linux | Linux | 5.10.258 <= 5.10.* | unaffected |
| Linux | Linux | 5.15.209 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.175 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.136 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.84 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.20 <= 6.18.* | unaffected |
| Linux | Linux | 6.19.10 <= 6.19.* | unaffected |
| Linux | Linux | 7.0 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/905ef207d5ed99ca64adfe39fba9ac46e434327a
- https://git.kernel.org/stable/c/5ef8ca1c164786da24169af155c1ca1ff1353cf8
- https://git.kernel.org/stable/c/9a779d1f480e83720b5384adf165604e7ee226bd
- https://git.kernel.org/stable/c/f77b51bcee7be2bb686b5f7a2d4a1921e4bdb9f4
- https://git.kernel.org/stable/c/3b4d27acafaeab478fd24f79ad6e593a892828b9
- https://git.kernel.org/stable/c/06e769dddcbeb3baf2ce346273b53dd61fdbecf4
- https://git.kernel.org/stable/c/50f1b690b4868923fbd242298def2fb88662f108
- https://git.kernel.org/stable/c/d5ad6ab61cbd89afdb60881f6274f74328af3ee9
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