What is CVE-2026-74492?

CVE-2026-74492 is a High severity Linux kernel vulnerability with a CVSS score of 8.4 out of 10, affecting Linux kernel versions from 5.4.24 onward and patched in 5.10.265, 5.15.216, 6.1.183 and others. CVE-2026-74492 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-74492?

CVE-2026-74492 has a CVSS score of 8.4 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-74492?

Yes, CVE-2026-74492 has been patched. Fixed versions include 5.10.265, 5.15.216, 6.1.183 and others. If you are running Linux kernel 5.4.24 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-74492 actively exploited?

CVE-2026-74492 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-74492

High

In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: do not update comments from kernel-side hash adds mtype_resize() copies comment pointers with memcpy(), not the comment objects themselves. During the window after an entry has been copied but before the table swap and backlog replay, the old table is still published for packet-side updates while the replacement-table entry already holds the same ip_set_comment_rcu pointer. If xt_SET --add-set ... --exist hits that old entry in this window, mtype_add() calls ip_set_init_comment() even though packet-side adds carry no comment payload. That call frees the shared comment through the old entry, so the replacement-table entry now holds a stale pointer. When the queued add is replayed on the new table, mtype_add() calls ip_set_init_comment() again and strlen() dereferences the stale pointer. Fix this in mtype_add() by skipping ip_set_init_comment() when ext->target marks a packet-side add. Userspace adds still update comments, while packet-side adds can no longer free comment storage shared with a resize copy.

Package Linux Kernel

Published 2026-08-15

Last modified 2026-08-19

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

8.4

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected versions

Linux kernel versions 5.4.24, 5.5.8, 5.6 and later are affected. Fixed in 5.10.265, 5.15.216, 6.1.183, 6.6.151, 6.12.103, 6.18.44, 7.1.8, 7.2 and their respective stable series.

Affected from

≥ 5.4.24 ≥ 5.5.8 ≥ 5.6

Fixed in

✓ 5.10.265 5.10.x ✓ 5.15.216 5.15.x ✓ 6.1.183 6.1.x ✓ 6.6.151 6.6.x ✓ 6.12.103 6.12.x ✓ 6.18.44 6.18.x ✓ 7.1.8 7.1.x ✓ 7.2

References

8 total

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2026-74492

Severity High

CVSS score 8.4 / 10

CVSS version 3.1

Published 2026-08-15

Modified 2026-08-19

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-74492?

CVE-2026-74492 is a High severity Linux kernel vulnerability with a CVSS score of 8.4 out of 10 . It affects Linux kernel versions from 5.4.24 onward and has been patched in 5.10.265, 5.15.216, 6.1.183 and others. CVE-2026-74492 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-74492?

CVE-2026-74492 has a CVSS score of 8.4 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-74492?

Yes. CVE-2026-74492 has been patched. Fixed versions include 5.10.265, 5.15.216, 6.1.183 and others. If you are running Linux kernel 5.4.24 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-74492 actively exploited?

No. CVE-2026-74492 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.