Critical 9.8Published May 1, 2025

CVE-2025-37778ksmbd: Fix dangling pointer in krb_authenticate

Updated under an hour ago (Oct 26, 2026, 9:00 PM ET)

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It affects Linux and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Fix dangling pointer in krb_authenticate krb_authenticate frees sess->user and does not set the pointer to NULL. It calls ksmbd_krb5_authenticate to reinitialise sess->user but that function may return without doing so. If that happens then smb2_sess_setup, which calls krb_authenticate, will be accessing free'd memory when it later uses sess->user.

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: Oct 15, 2026
First seen by InfoSec Signals: Oct 15, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 0626e6641f6b467447c81dd7678a69c66f7746cf before b61f04d5d73c53d183019bafe22fb700a739bac5; from 0626e6641f6b467447c81dd7678a69c66f7746cf before d5b554bc8d554ed6ddf443d3db2fad9f665cec10; 0626e6641f6b467447c81dd7678a69c66f7746cf builds before 1db2451de23e98bc864c6a6e52aa0d82c91cb325; 0626e6641f6b467447c81dd7678a69c66f7746cf builds before 6e30c0e10210c714f3d4453dc258d4abcc70364e; from 0626e6641f6b467447c81dd7678a69c66f7746cf before e83e39a5f6a01a81411a4558a59a10f87aa88dd6; 0626e6641f6b467447c81dd7678a69c66f7746cf builds before 1e440d5b25b7efccb3defe542a73c51005799a5f	CNA record
linux linux_kernel linux:linux_kernel	from 5.15 before 6.1.135; from 6.2 before 6.6.88; from 6.7 before 6.12.25; from 6.13 before 6.14.4; 6.15; 6.15	NVD
debian debian_linux debian:debian_linux	11.0	NVD

References

References

https://git.kernel.org/stable/c/b61f04d5d73c53d183019bafe22fb700a739bac5
https://git.kernel.org/stable/c/d5b554bc8d554ed6ddf443d3db2fad9f665cec10	patch
https://git.kernel.org/stable/c/1db2451de23e98bc864c6a6e52aa0d82c91cb325	patch
https://git.kernel.org/stable/c/6e30c0e10210c714f3d4453dc258d4abcc70364e	patch
https://git.kernel.org/stable/c/e83e39a5f6a01a81411a4558a59a10f87aa88dd6	patch
https://git.kernel.org/stable/c/1e440d5b25b7efccb3defe542a73c51005799a5f	patch
https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html	mailing-list, third-party-advisory

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.