Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-23444

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
03/04/2026
Last modified:
27/04/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> wifi: mac80211: always free skb on ieee80211_tx_prepare_skb() failure<br /> <br /> ieee80211_tx_prepare_skb() has three error paths, but only two of them<br /> free the skb. The first error path (ieee80211_tx_prepare() returning<br /> TX_DROP) does not free it, while invoke_tx_handlers() failure and the<br /> fragmentation check both do.<br /> <br /> Add kfree_skb() to the first error path so all three are consistent,<br /> and remove the now-redundant frees in callers (ath9k, mt76,<br /> mac80211_hwsim) to avoid double-free.<br /> <br /> Document the skb ownership guarantee in the function&amp;#39;s kdoc.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
7.80
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 3.13.1 (including) 6.18.20 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.19 (including) 6.19.10 (excluding)
cpe:2.3:o:linux:linux_kernel:3.13:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools