CVE-2026-53010
Critical · CVSS 9.8Linux Kernel ksmbd — use-after-free
- CVSS
- 9.8
- nvd
- EPSS
- 0.43%
- 36th pct
- KEV
- No
- Class
- oss containerizable
- CWE-416
Description
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.
Search profile — drives PoC discovery
Symbols smb2_openksmbd_put_durable_fdksmbd_iov_pin_rspfp->create_timeerr_out2durable reconnect
Keywords CVE-2026-53010ksmbduse-after-freesmb2_opendurable reconnectksmbd_put_durable_fdLinux kernelUAF
Versions: Linux kernel versions prior to fixes in commits 1baff47b81f9, 97a0cd55283b, ce2e164c1c51
Affected packages
| Linux | Kernel | 6.19.0 → 7.0.10 |
| Linux | Kernel | 6.9.0 → 6.18.33 |
References
- https://git.kernel.org/stable/c/1baff47b81f94f9231c91236aa511420d0e266b9
- https://git.kernel.org/stable/c/4db3dcac84c2f14a45ae201efb38de1fb1bfc009
- https://git.kernel.org/stable/c/97a0cd55283b4e63fd92804da91c8d9896adcad9
- https://git.kernel.org/stable/c/ce2e164c1c51c3f7813b80f8c926836e896bcbb3
- https://git.kernel.org/stable/c/f0ff7f12398e85b3a11745ff7feab6246f3d75c2
Status: enriched · ingested 2026-07-11T00:00:26.000Z · profiled 2026-07-11T00:30:26.000Z