Vulnerability details
CVE-2026-53010
Linux Linux
ksmbd: fix use-after-free in smb2_open during durable reconnect
CVSS 3.1
9.8Critical
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.8Critical | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 6.9 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 6.6.32 ≤ v < 6.6.157 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 8df4bcdb0a4232192b2445256c39b787d58ef14d ≤ v < f0ff7f12398e85b3a11745ff7feab6246f3d75c2 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | c8efcc786146a951091588e5fa7e3c754850cb3c ≤ v < 1baff47b81f94f9231c91236aa511420d0e266b9 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | c8efcc786146a951091588e5fa7e3c754850cb3c ≤ v < 97a0cd55283b4e63fd92804da91c8d9896adcad9 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | c8efcc786146a951091588e5fa7e3c754850cb3c ≤ v < 4db3dcac84c2f14a45ae201efb38de1fb1bfc009 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | c8efcc786146a951091588e5fa7e3c754850cb3c ≤ v < ce2e164c1c51c3f7813b80f8c926836e896bcbb3 | CVEProject cvelistV5 (CNA) |
References and advisories
5- https://git.kernel.org/stable/c/f0ff7f12398e85b3a11745ff7feab6246f3d75c2
- https://git.kernel.org/stable/c/4db3dcac84c2f14a45ae201efb38de1fb1bfc009
- https://git.kernel.org/stable/c/ce2e164c1c51c3f7813b80f8c926836e896bcbb3
- https://git.kernel.org/stable/c/97a0cd55283b4e63fd92804da91c8d9896adcad9
- https://git.kernel.org/stable/c/1baff47b81f94f9231c91236aa511420d0e266b9
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Details
- Published
- 2026-06-24
- Last updated
- 2026-09-14
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
0.44%
Probability of exploitation in 30 days
38.8%
Percentile (among all CVEs)
Weaknesses (CWE)
- —