CVE-2026-53010ksmbd: fix use-after-free in smb2_open during durable reconnect
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Sep 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 8df4bcdb0a4232192b2445256c39b787d58ef14d before f0ff7f12398e85b3a11745ff7feab6246f3d75c2; from c8efcc786146a951091588e5fa7e3c754850cb3c before 4db3dcac84c2f14a45ae201efb38de1fb1bfc009; from c8efcc786146a951091588e5fa7e3c754850cb3c before ce2e164c1c51c3f7813b80f8c926836e896bcbb3; from c8efcc786146a951091588e5fa7e3c754850cb3c before 97a0cd55283b4e63fd92804da91c8d9896adcad9; from c8efcc786146a951091588e5fa7e3c754850cb3c before 1baff47b81f94f9231c91236aa511420d0e266b9; from 6.6.32 before 6.6.157 | CNA record |
linux linux_kernel linux:linux_kernel | from 6.6.32 before 6.7; from 6.9 before 6.18.33; from 6.19 before 7.0.10 | NVD |
References
- https://git.kernel.org/stable/c/f0ff7f12398e85b3a11745ff7feab6246f3d75c2
- https://git.kernel.org/stable/c/4db3dcac84c2f14a45ae201efb38de1fb1bfc009
- https://git.kernel.org/stable/c/ce2e164c1c51c3f7813b80f8c926836e896bcbb3patch
- https://git.kernel.org/stable/c/97a0cd55283b4e63fd92804da91c8d9896adcad9patch
- https://git.kernel.org/stable/c/1baff47b81f94f9231c91236aa511420d0e266b9patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.