CVE-2026-23444
wifi: mac80211: always free skb on ieee80211_tx_prepare_skb() failure
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Apr 3, 2026 |
| Last Updated | Jun 1, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
06be6b149f7e406bcf16098567f5a6c9f042bced < 905ef207d5ed99ca64adfe39fba9ac46e434327a 06be6b149f7e406bcf16098567f5a6c9f042bced < 5ef8ca1c164786da24169af155c1ca1ff1353cf8 06be6b149f7e406bcf16098567f5a6c9f042bced < 9a779d1f480e83720b5384adf165604e7ee226bd 06be6b149f7e406bcf16098567f5a6c9f042bced < f77b51bcee7be2bb686b5f7a2d4a1921e4bdb9f4 06be6b149f7e406bcf16098567f5a6c9f042bced < 3b4d27acafaeab478fd24f79ad6e593a892828b9 06be6b149f7e406bcf16098567f5a6c9f042bced < 06e769dddcbeb3baf2ce346273b53dd61fdbecf4 06be6b149f7e406bcf16098567f5a6c9f042bced < 50f1b690b4868923fbd242298def2fb88662f108 06be6b149f7e406bcf16098567f5a6c9f042bced < d5ad6ab61cbd89afdb60881f6274f74328af3ee9
Linux / Linux
3.13
References
git.kernel.org: https://git.kernel.org/stable/c/905ef207d5ed99ca64adfe39fba9ac46e434327a git.kernel.org: https://git.kernel.org/stable/c/5ef8ca1c164786da24169af155c1ca1ff1353cf8 git.kernel.org: https://git.kernel.org/stable/c/9a779d1f480e83720b5384adf165604e7ee226bd git.kernel.org: https://git.kernel.org/stable/c/f77b51bcee7be2bb686b5f7a2d4a1921e4bdb9f4 git.kernel.org: https://git.kernel.org/stable/c/3b4d27acafaeab478fd24f79ad6e593a892828b9 git.kernel.org: https://git.kernel.org/stable/c/06e769dddcbeb3baf2ce346273b53dd61fdbecf4 git.kernel.org: https://git.kernel.org/stable/c/50f1b690b4868923fbd242298def2fb88662f108 git.kernel.org: https://git.kernel.org/stable/c/d5ad6ab61cbd89afdb60881f6274f74328af3ee9