CVE-2026-31609
In the Linux kernel, the following vulnerability has been resolved: smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush() smbd_send_batch_flush() already calls smbd_free_send_io(), so we should not call it again after…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.46%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush() smbd_send_batch_flush() already calls smbd_free_send_io(), so we should not call it again after smbd_post_send() moved it to the batch list.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.46% probability · 39th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-415
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/22b7c1c619d808aec4cad3dc42103345e370d107Patch
- https://git.kernel.org/stable/c/27b7c3e916218b5eb2ee350211140e961bfc49bePatch
- https://git.kernel.org/stable/c/a9940dcbe5cb92482c04efc7341039ddf7dbf607Patch
- https://git.kernel.org/stable/c/f9a162c2bbcd0ac85bd07c5b37cf20286048b65cPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.