8.4

CVE-2026-74492: linux

CVSS: 8.4v3.1HighReceived
AliasesUBUNTU-CVE-2026-74492DEBIAN-CVE-2026-74492
Published 15-08-2026Last modified 16-10-2026
Open JSON

Vulnerability summary

CVE-2026-74492 is a high (CVSS 8.4) vulnerability in linux. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 3.1% of scored vulnerabilities.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.4/10
010
High · v3.1 (CVE.org)
EPSS score
0.14%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 21 · Related 21
OPENSUSE-SU-2026:22091-1SUSE-SU-2026:24179-1SUSE-SU-2026:24181-1SUSE-SU-2026:24182-1SUSE-SU-2026:24184-1SUSE-SU-2026:24197-1

Timeline

  1. 15-08-2026
    PublishedVulnerability first disclosed.
  2. 16-10-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

0.00 pp

From 0.14% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.14%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu165 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.187-1 | < 6.12.105-1 | < 7.1.8-1
  • linux-6.12< 6.12.107-1~deb12u1
Linux1 product
  • linux≥ f66ee0410b1c3481ee75e5db9b34547b4d582465, < 6f13f4d52d06986c18f12e8bffaab944dd27ceab | ≥ f66ee0410b1c3481ee75e5db9b34547b4d582465, < f9d6cabff1fca010562dcdb0d22b296bdca3ba5a | ≥ f66ee0410b1c3481ee75e5db9b34547b4d582465, < 16bfa7be2d76ca1e0aacfa363482e1bf8ab5042a | ≥ f66ee0410b1c3481ee75e5db9b34547b4d582465, < 661ff9c0cfbe07f8eed920dde9f7781491738207 | ≥ f66ee0410b1c3481ee75e5db9b34547b4d582465, < c710e9bf38e4e71a8db85d26a0f70c0674664207 | ≥ f66ee0410b1c3481ee75e5db9b34547b4d582465, < 4ae701848e4ba9e9713375fb7d82218cbd309da2 | ≥ f66ee0410b1c3481ee75e5db9b34547b4d582465, < 77dbb248a5cc7a5270cd37bbb0b635bf059a872a | ≥ f66ee0410b1c3481ee75e5db9b34547b4d582465, < f30415929be8aeb002d557c8d3f7ab2d2188003a | 5dd9488ae41070b69d2f4acb580f77db5705f9ca | a469bab3386aebff33c59506f3a95e35b91118fd | ≥ 5.4.24, < 5.5 | ≥ 5.5.8, < 5.6 | 5.6

3 vendors · 168 products

References

20 links
Show all 20 references