High severity7.8NVD Advisory· Published Apr 3, 2026· Updated Jun 1, 2026
CVE-2026-23444
CVE-2026-23444
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
71cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 9 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=3.13.1,<6.18.20
- 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:*:*:*:*:*:*
- (no CPE)
- osv-coords61 versionspkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP7pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP7pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2016.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP7pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Legacy%2015%20SP7pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5-LTSSpkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP7pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP7pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-livepatch-SLE15-SP7-RT_Update_16&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP7pkg:rpm/suse/kernel-livepatch-SLE15-SP7_Update_16&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP7pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP7pkg:rpm/suse/kernel-obs-qa&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-obs-qa&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP7pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP7pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5-LTSSpkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP7pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP7pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5-LTSSpkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP7pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_84&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5
< 6.4.0-150700.53.60.1+ 60 more
- (no CPE)range: < 6.4.0-150700.53.60.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.4.0-150700.53.60.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.4.0-150700.53.60.1.150700.17.35.4
- (no CPE)range: < 6.12.0-160000.34.1.160000.2.15
- (no CPE)range: < 6.12.0-160000.34.1.160000.2.15
- (no CPE)range: < 6.4.0-47.1.21.24
- (no CPE)range: < 6.4.0-47.1.21.24
- (no CPE)range: < 6.12.0-160000.34.1.160000.2.15
- (no CPE)range: < 6.4.0-150700.53.60.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 4.12.14-122.317.1
- (no CPE)range: < 6.4.0-150700.53.60.1
- (no CPE)range: < 6.4.0-150700.53.60.1
- (no CPE)range: < 6.4.0-150700.53.60.1
- (no CPE)range: < 4.12.14-122.317.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 4.12.14-122.317.1
- (no CPE)range: < 6.4.0-150700.53.60.1
- (no CPE)range: < 6.4.0-47.1
- (no CPE)range: < 6.4.0-47.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.4.0-150700.53.60.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.4.0-47.1
- (no CPE)range: < 6.4.0-47.1
- (no CPE)range: < 1-150700.1.5.2
- (no CPE)range: < 1-150700.15.3.2
- (no CPE)range: < 6.4.0-150700.53.60.2
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.4.0-150700.7.59.2
- (no CPE)range: < 6.4.0-150700.53.60.1
- (no CPE)range: < 6.4.0-150700.53.60.1
- (no CPE)range: < 4.12.14-122.317.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 4.12.14-122.317.1
- (no CPE)range: < 6.4.0-47.1
- (no CPE)range: < 6.4.0-47.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.4.0-150700.7.59.2
- (no CPE)range: < 6.4.0-150700.53.60.1
- (no CPE)range: < 4.12.14-122.317.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 4.12.14-122.317.1
- (no CPE)range: < 6.4.0-150700.7.59.1
- (no CPE)range: < 6.4.0-150700.53.60.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 1-8.7.1
Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/06e769dddcbeb3baf2ce346273b53dd61fdbecf4nvdPatch
- git.kernel.org/stable/c/50f1b690b4868923fbd242298def2fb88662f108nvdPatch
- git.kernel.org/stable/c/d5ad6ab61cbd89afdb60881f6274f74328af3ee9nvdPatch
- git.kernel.org/stable/c/3b4d27acafaeab478fd24f79ad6e593a892828b9nvd
- git.kernel.org/stable/c/5ef8ca1c164786da24169af155c1ca1ff1353cf8nvd
- git.kernel.org/stable/c/905ef207d5ed99ca64adfe39fba9ac46e434327anvd
- git.kernel.org/stable/c/9a779d1f480e83720b5384adf165604e7ee226bdnvd
- git.kernel.org/stable/c/f77b51bcee7be2bb686b5f7a2d4a1921e4bdb9f4nvd
News mentions
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