CVE-2025-38437

ksmbd: fix potential use-after-free in oplock/lease break ack

HIGH

7.8

CVSS Score

Published: July 25, 2025 at 03:27 PM UTC

Updated: August 5, 2026 at 12:44 PM UTC

2 products affected across 2 vendorsLinux KernelDebian Linux

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Severity

HIGH7.8

Exploit prediction

EPSS 0.4%

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix potential use-after-free in oplock/lease break ack If ksmbd_iov_pin_rsp return error, use-after-free can happen by accessing opinfo->state and opinfo_put and ksmbd_fd_put could called twice.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux · Debiandrupal

95%

11.0

Linux Kernel · Linux

95%

5.15 ≤ v < 6.1.1465.15 ≤ v < 6.12.395.15 ≤ v < 6.15.75.15 ≤ v < 6.165.15 ≤ v < 6.6.996.13 ≤ v < 6.15.76.2 ≤ v < 6.6.996.7 ≤ v < 6.12.396.16 rc1 6.16 rc2 6.16 rc3 6.16 rc4 6.16 rc5626e6641f6b467447c81dd7678a69c66f7746cf

Vendor states this is fixed in 50f930db22365738d9387c974416f38a06e8057e (fixed)

Vendor states this is fixed in 8106adc21a2270c16abf69cd74ccd7c79c6e7acd (fixed)

Vendor states this is fixed in 815f1161d6dbc4c54ccf94b7d3fdeab34b4d7477 (fixed)

Vendor states this is fixed in 97c355989928a5f60b228ef5266c1be67a46cdf9 (fixed)

Vendor states this is fixed in e38ec88a2b42c494601b1213816d75f0b54d9bf0 (fixed)

Vendor states this is fixed in 5.15 (unaffected)

Vendor states this is fixed in 6.1.146 (unaffected)

Vendor states this is fixed in 6.12.39 (unaffected)

Vendor states this is fixed in 6.15.7 (unaffected)

Vendor states this is fixed in 6.16 (unaffected)

Vendor states this is fixed in 6.6.99 (unaffected)