9.8

CVE-2026-53010

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

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 6.6.32 < 6.7
Linux ≫ Linux Kernel Version >= 6.9 < 6.18.33
Linux ≫ Linux Kernel Version >= 6.19 < 7.0.10
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.43% 0.351
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 9.8 3.9 5.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/ce2e164c1c51c3f7813b80f8c926836e896bcbb3
Patch
https://git.kernel.org/stable/c/97a0cd55283b4e63fd92804da91c8d9896adcad9
Patch
https://git.kernel.org/stable/c/1baff47b81f94f9231c91236aa511420d0e266b9
Patch