CVE-2026-23444

Advisory lineage Upstream: 0 Downstream: 3
Modified
Published: 03 Apr 2026, 15:15
Last modified:01 Jun 2026, 16:11

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (cve.org)
EPSS Score
0.13% LOW
0% probability +0.11%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

03 Apr 2026, 15:15
Published
Vulnerability first disclosed
01 Jun 2026, 16:11
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.13%• Percentile: 3%

Techniques & Countermeasures

  • CWE-401•Missing Release of Memory after Effective Lifetime

    The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

Affected Systems

  • linux•linux

    ≥ 06be6b149f7e406bcf16098567f5a6c9f042bced, < 905ef207d5ed99ca64adfe39fba9ac46e434327a | ≥ 06be6b149f7e406bcf16098567f5a6c9f042bced, < 5ef8ca1c164786da24169af155c1ca1ff1353cf8 | ≥ 06be6b149f7e406bcf16098567f5a6c9f042bced, < 9a779d1f480e83720b5384adf165604e7ee226bd | ≥ 06be6b149f7e406bcf16098567f5a6c9f042bced, < f77b51bcee7be2bb686b5f7a2d4a1921e4bdb9f4 | ≥ 06be6b149f7e406bcf16098567f5a6c9f042bced, < 3b4d27acafaeab478fd24f79ad6e593a892828b9 | ≥ 06be6b149f7e406bcf16098567f5a6c9f042bced, < 06e769dddcbeb3baf2ce346273b53dd61fdbecf4 | ≥ 06be6b149f7e406bcf16098567f5a6c9f042bced, < 50f1b690b4868923fbd242298def2fb88662f108 | ≥ 06be6b149f7e406bcf16098567f5a6c9f042bced, < d5ad6ab61cbd89afdb60881f6274f74328af3ee9 | 3.13

  • linux•linux_kernel

    ≥ 3.13.1, < 6.18.20 | ≥ 6.19, < 6.19.10 | 3.13 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6 | 7.0:rc7

References (8)