In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover… (CVE-2026-64122)
In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover mlx5e_tx_reporter_timeout_recover() accesses sq->netdev after mlx5e_safe_reopen_channels() has torn down and freed the channel (and its embedded SQs). Replace the three sq->netdev references with priv->netdev which is safe because priv outlives channel teardown. The netdev_err() call already used priv->netdev for this reason; make the trylock/unlock and health_channel_eq_recover calls consistent. This fixes the following KASAN splat: BUG: KASAN: use-after-free in mlx5e_tx_reporter_timeout_recover+0x1dd/0x360 [mlx5_core] Read of size 8 at addr ffff889860ed0b28 by task kworker/u113:2/5277 Call Trace: mlx5e_tx_reporter_timeout_recover+0x1dd/0x360 [mlx5_core] devlink_health_reporter_recover+0xa2/0x150 devlink_health_report+0x254/0x7c0 mlx5e_reporter_tx_timeout+0x297/0x380 [mlx5_core] mlx5e_tx_timeout_work+0x109/0x170 [mlx5_core] process_one_work+0x677/0xf20 worker_thread+0x51f/0xd90 kthread+0x3a5/0x810 ret_from_fork+0x208/0x400 ret_from_fork_asm+0x1a/0x30
AI Analysis
Technical Summary
The Linux kernel vulnerability CVE-2026-64122 concerns a use-after-free condition in the mlx5e_tx_reporter_timeout_recover function of the mlx5e network driver. The function accessed sq->netdev after the associated channel and its send queues (SQs) had been freed by mlx5e_safe_reopen_channels. The fix involved replacing sq->netdev references with priv->netdev, which remains valid beyond channel teardown. This change prevents invalid memory access and resolves a KASAN-detected bug. The vulnerability was addressed in the Linux kernel source, but no specific affected versions or patch links are provided in the data.
Potential Impact
The vulnerability could cause kernel crashes or instability due to use-after-free memory access in the mlx5e network driver. This may lead to denial of service conditions on affected systems. There is no information about privilege escalation or code execution impacts. No known exploits have been reported in the wild.
Mitigation Recommendations
A fix for this use-after-free vulnerability has been implemented in the Linux kernel source code. Users should update to a Linux kernel version that includes this fix once it is released. Patch status is not explicitly confirmed in the provided data; therefore, check the official Linux kernel advisories or vendor updates for the exact fixed versions and apply the update accordingly.
In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover… (CVE-2026-64122)
Description
In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover mlx5e_tx_reporter_timeout_recover() accesses sq->netdev after mlx5e_safe_reopen_channels() has torn down and freed the channel (and its embedded SQs). Replace the three sq->netdev references with priv->netdev which is safe because priv outlives channel teardown. The netdev_err() call already used priv->netdev for this reason; make the trylock/unlock and health_channel_eq_recover calls consistent. This fixes the following KASAN splat: BUG: KASAN: use-after-free in mlx5e_tx_reporter_timeout_recover+0x1dd/0x360 [mlx5_core] Read of size 8 at addr ffff889860ed0b28 by task kworker/u113:2/5277 Call Trace: mlx5e_tx_reporter_timeout_recover+0x1dd/0x360 [mlx5_core] devlink_health_reporter_recover+0xa2/0x150 devlink_health_report+0x254/0x7c0 mlx5e_reporter_tx_timeout+0x297/0x380 [mlx5_core] mlx5e_tx_timeout_work+0x109/0x170 [mlx5_core] process_one_work+0x677/0xf20 worker_thread+0x51f/0xd90 kthread+0x3a5/0x810 ret_from_fork+0x208/0x400 ret_from_fork_asm+0x1a/0x30
CVSS v3.1
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel vulnerability CVE-2026-64122 concerns a use-after-free condition in the mlx5e_tx_reporter_timeout_recover function of the mlx5e network driver. The function accessed sq->netdev after the associated channel and its send queues (SQs) had been freed by mlx5e_safe_reopen_channels. The fix involved replacing sq->netdev references with priv->netdev, which remains valid beyond channel teardown. This change prevents invalid memory access and resolves a KASAN-detected bug. The vulnerability was addressed in the Linux kernel source, but no specific affected versions or patch links are provided in the data.
Potential Impact
The vulnerability could cause kernel crashes or instability due to use-after-free memory access in the mlx5e network driver. This may lead to denial of service conditions on affected systems. There is no information about privilege escalation or code execution impacts. No known exploits have been reported in the wild.
Mitigation Recommendations
A fix for this use-after-free vulnerability has been implemented in the Linux kernel source code. Users should update to a Linux kernel version that includes this fix once it is released. Patch status is not explicitly confirmed in the provided data; therefore, check the official Linux kernel advisories or vendor updates for the exact fixed versions and apply the update accordingly.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-q9qw-8fg7-ffww
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-64122"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a5d27a82a4a8d598912abbe
Added to database: 07/19/2026, 19:38:16 UTC
Last enriched: 07/19/2026, 19:43:58 UTC
Last updated: 07/20/2026, 19:41:21 UTC
Views: 16
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.