Use After Free Affecting linux-6.12 package, versions <6.12.111-1~deb12u1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN12-LINUX612-20506599
- published5 Oct 2026
- disclosed24 Jun 2026
Introduced: 24 Jun 2026
CVE-2026-53010 (opens in a new tab)How to fix?
Upgrade Debian:12 linux-6.12 to version 6.12.111-1~deb12u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream linux-6.12 package and not the linux-6.12 package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: fix use-after-free in smb2_open during durable reconnect
In smb2_open, the call to ksmbd_put_durable_fd(fp) drops the reference to the durable file descriptor early during the durable reconnect process. If an error occurs subsequently (eg, ksmbd_iov_pin_rsp fails) or a scavenger accesses the file, it leads to a use-after-free when accessing fp properties (eg fp->create_time).
Move the single put to the end of the function below err_out2 so fp stays valid until smb2_open returns.
References
- https://security-tracker.debian.org/tracker/CVE-2026-53010
- https://git.kernel.org/stable/c/1baff47b81f94f9231c91236aa511420d0e266b9
- https://git.kernel.org/stable/c/97a0cd55283b4e63fd92804da91c8d9896adcad9
- https://git.kernel.org/stable/c/ce2e164c1c51c3f7813b80f8c926836e896bcbb3
- https://git.kernel.org/stable/c/4db3dcac84c2f14a45ae201efb38de1fb1bfc009
- https://git.kernel.org/stable/c/f0ff7f12398e85b3a11745ff7feab6246f3d75c2