9.8

CVE-2026-72351: linux

CVSS: 9.8v3.1CriticalReceived
AliasesUBUNTU-CVE-2026-72351DEBIAN-CVE-2026-72351
Published 15-08-2026Last modified 16-10-2026
Open JSON

Vulnerability summary

CVE-2026-72351 is a critical (CVSS 9.8) vulnerability in linux. EPSS estimates a 0.74% chance of exploitation in the next 30 days, higher than 53.9% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.74%
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 24 · Related 24
OPENSUSE-SU-2026:22091-1SUSE-SU-2026:4640-1SUSE-SU-2026:4660-1SUSE-SU-2026:4665-1SUSE-SU-2026:4666-1SUSE-SU-2026:4667-1

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: gue: validate REMCSUM private option length GUE private flags can indicate that remote checksum offload metadata is present. The private flags field itself is accounted for by guehdr_flags_len(), but guehdr_priv_flags_len() currently returns 0 even when GUE_PFLAG_REMCSUM is set. This lets a packet with only the private flags field pass validate_gue_flags(), after which gue_remcsum() and gue_gro_remcsum() read the missing REMCSUM start/offset fields from the following bytes. Account for GUE_PLEN_REMCSUM when GUE_PFLAG_REMCSUM is present so that malformed packets are rejected during option validation.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.74%

Chance of exploitation in the next 30 days

Percentile

54%

Versus all other CVEs

30-day change

0.00 pp

From 0.74% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.74%

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≥ c1aa8347e73e4092411fbd96cc59531fb7e76d04, < 158b9995d3c87f3b93f5c22df54a12e12a3438b3 | ≥ c1aa8347e73e4092411fbd96cc59531fb7e76d04, < 7c6876ec1b227261b51803f784c7be1b2242a1a0 | ≥ c1aa8347e73e4092411fbd96cc59531fb7e76d04, < 2c4de9988e9ddc760b750d6b6e701c35ff60ad14 | ≥ c1aa8347e73e4092411fbd96cc59531fb7e76d04, < 2a99224c120823987e4d829726f4ecb33e03fc1e | ≥ c1aa8347e73e4092411fbd96cc59531fb7e76d04, < 61e78679c7c9ca685bff58e4b6348304dc60aafd | ≥ c1aa8347e73e4092411fbd96cc59531fb7e76d04, < 4a4a1d41c6e901e773bcf795f562a47fa71f692a | ≥ c1aa8347e73e4092411fbd96cc59531fb7e76d04, < f618cbe9b24cd0202004d2db781d5f80ab77037f | ≥ c1aa8347e73e4092411fbd96cc59531fb7e76d04, < d335dcc6f521571d57117b8deeebc940836e5450 | 3.19

3 vendors · 171 products

References

27 links
Show all 27 references