by Kastro
Paper/Archive/CVE-2026-53010

CVE-2026-53010

Linux Linux — ksmbd: fix use-after-free in smb2_open during durable reconnect

EPSS 0.4%CVSS 9.8
critical.is priorityof 100
37
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 38.7.387 × 207.7No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Linux8df4bcdb0a4232192b2445256c39b787d58ef14d – < f0ff7f12398e85b3a11745ff7feab6246f3d75c2f0ff7f12398e85b3a11745ff7feab6246f3d75c2CNA
Linuxc8efcc786146a951091588e5fa7e3c754850cb3c – < 4db3dcac84c2f14a45ae201efb38de1fb1bfc0094db3dcac84c2f14a45ae201efb38de1fb1bfc009CNA
Linuxc8efcc786146a951091588e5fa7e3c754850cb3c – < ce2e164c1c51c3f7813b80f8c926836e896bcbb3ce2e164c1c51c3f7813b80f8c926836e896bcbb3CNA
Linuxc8efcc786146a951091588e5fa7e3c754850cb3c – < 97a0cd55283b4e63fd92804da91c8d9896adcad997a0cd55283b4e63fd92804da91c8d9896adcad9CNA
Linuxc8efcc786146a951091588e5fa7e3c754850cb3c – < 1baff47b81f94f9231c91236aa511420d0e266b91baff47b81f94f9231c91236aa511420d0e266b9CNA
Linux6.6.32 – < 6.6.1576.6.157CNA
Linux6.96.6.157CNA

Scores by source

Linux (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

refgit.kernel.org/stable/c/f0ff7f12398e85b3a11745ff7feab6246f3d75c2refgit.kernel.org/stable/c/4db3dcac84c2f14a45ae201efb38de1fb1bfc009refgit.kernel.org/stable/c/ce2e164c1c51c3f7813b80f8c926836e896bcbb3refgit.kernel.org/stable/c/97a0cd55283b4e63fd92804da91c8d9896adcad9refgit.kernel.org/stable/c/1baff47b81f94f9231c91236aa511420d0e266b9