4.8

CVE-2026-74290: linux

CVSS: 4.8v4.0MediumReceived
AliasesUBUNTU-CVE-2026-74290DEBIAN-CVE-2026-74290
Published 15-08-2026Last modified 17-08-2026
Open JSON

Vulnerability summary

CVE-2026-74290 is a medium (CVSS 4.8) vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6.3% of scored vulnerabilities.

Overall risk
19/100
0100
Low · default modelHow is this calculated?
CVSS score
4.8/10
010
Medium · v4.0 (OSV · Ubuntu), selected by version preference
EPSS score
0.17%
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 18 · Related 18
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. 17-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net/sched: cls_flow: Dont expose folded kernel pointers The flow classifier falls back to addr_fold() for fields that are missing from packet headers. In map mode, userspace controls mask, xor, rshift, addend and divisor, and can observe the resulting classid through class statistics. This allows a tc classifier in a user/network namespace to recover the 32-bit folded value of skb->sk, skb_dst() or skb_nfct(). Align with standard kernel practices for pointer hashing and replace the XOR folding with a keyed siphash (which is cryptographically secure)

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

0.00 pp

From 0.17% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.17%

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) | < 6.8.0-147.147 | < 7.0.0-38.38
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1067.70 | < 7.0.0-1014.14
  • 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≥ e5dfb815181fcb186d6080ac3a091eadff2d98fe, < 19f2ecf8ea564562c7e7a919cf38068dd9aa1c96 | ≥ e5dfb815181fcb186d6080ac3a091eadff2d98fe, < 3d054001860270748405a3f9270c5fa0bf7ffc19 | ≥ e5dfb815181fcb186d6080ac3a091eadff2d98fe, < fb31fbe51c233f3bf47021121f63d2e42cac2d08 | ≥ e5dfb815181fcb186d6080ac3a091eadff2d98fe, < 0a8b5b74f0e6b6b9ce453bcfa4baa502c4c7577a | ≥ e5dfb815181fcb186d6080ac3a091eadff2d98fe, < 6151159618198675e01c391676e579738286c135 | ≥ e5dfb815181fcb186d6080ac3a091eadff2d98fe, < f294fc71c4a0fa4964f6428a1b4e7929c1d83125 | 2.6.25

3 vendors · 171 products

References

18 links
Show all 18 references