9.1

CVE-2026-72348: linux

CVSS: 9.1v3.1CriticalReceived
AliasesUBUNTU-CVE-2026-72348DEBIAN-CVE-2026-72348
Published 15-08-2026Last modified 16-10-2026
Open JSON

Vulnerability summary

CVE-2026-72348 is a critical (CVSS 9.1) vulnerability in linux. EPSS estimates a 0.63% chance of exploitation in the next 30 days, higher than 49% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.1/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.63%
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 25 · Related 25
OPENSUSE-SU-2026:22091-1SUSE-SU-2026:4639-1SUSE-SU-2026:4640-1SUSE-SU-2026:4660-1SUSE-SU-2026:4665-1SUSE-SU-2026:4666-1

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: ip6tables: mark malformed IPv6 extension headers for hotdrop The ah, hbh and rt matches check that the fixed extension header is present, then use the header length field to derive the advertised extension header length for matching. For the ah match, add the missing advertised-length check. For hbh and rt, update the existing advertised-length checks. In all three cases, set hotdrop to true before returning false when the advertised extension header length exceeds the available skb data. Returning false treats the packet as a rule mismatch. Set hotdrop to true and drop malformed packets so they cannot bypass rules intended to drop packets with these IPv6 extension headers.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.63%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

0.00 pp

From 0.63% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.63%

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

Ubuntu169 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-147.147 | < 7.0.0-34.34
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1067.70 | < 7.0.0-1013.13
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.180-1 | < 6.12.100-1 | < 7.1.5-1
Linux1 product
  • linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < f16d856b6af5fd0e7cb0b0212f70825b599ef72e | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < fc416870100cf16d5b9495199355a679c3a02d48 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < f775fcf384b06f35b612f78fa5601fee99eb6513 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 2fd89a50a9783eed8ed23866b11c8b3d8779a7a8 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 3578b6d92a5b1e603ae6e8c8f5538a709f03aba4 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 3d441be2b1c5e98167302fa1c7b61960a067b112 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < d5e39e5eb6b30bc4a3bb7aba54c293cf36a806c7 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 43ccc20b5a733226417832cf16ef45322e594990 | 2.6.12

3 vendors · 171 products

References

27 links
Show all 27 references