4.4

CVE-2026-98078: linux Out-of-bounds Read

CVSS: 4.4v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-98078DEBIAN-CVE-2026-98078CGA-5g7h-576h-vjrf
Published 25-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-98078 is a medium (CVSS 4.4) Out-of-bounds Read vulnerability in linux. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 3.8% of scored vulnerabilities.

Overall risk
18/100
0100
Low · default modelHow is this calculated?
CVSS score
4.4/10
010
Medium · v3.1 (NVD)
EPSS score
0.15%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 1
MGASA-2026-0506OPENSUSE-SU-2026:12131-1

Timeline

  1. 25-09-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ipvs: fix reversed sequence option serialization hton_seq() expects the host-order source first and the unaligned network-order destination second. The version 1 sync sender passes these arguments in reverse for both sequence blocks. This leaves 24 bytes of the kmalloc-backed message unwritten. It may disclose stale heap data and replace the live connection sequence state with values read from the buffer. Pass the connection sequence state as the source and the message payload as the destination for both blocks.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.15%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

26-09-202621-10-2026
EPSS score
0.15%

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

Affected systems

Ubuntu169 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linuxAll versions (No fix recorded) | < 6.1.190-1 | < 6.12.111-1 | < 7.2.7-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux2 products
  • linux≥ 986a075795339c5ea1122ce9290dfd5504252eb0, < ae38b2ae16f709c0193e1b4340bde26ef3e2687d | ≥ 986a075795339c5ea1122ce9290dfd5504252eb0, < bbc68ba258a4eb0a2ca3b3a105550801aa8b00b0 | ≥ 986a075795339c5ea1122ce9290dfd5504252eb0, < f487b5788f15c6c32a219ed1480d25c93fc18d30 | ≥ 986a075795339c5ea1122ce9290dfd5504252eb0, < 677ff8ab30a663cde984d8afe86465fd0d81aeef | ≥ 986a075795339c5ea1122ce9290dfd5504252eb0, < e1c9f9446d3eaae323f1689f9e5de3b1ad6e47ec | ≥ 986a075795339c5ea1122ce9290dfd5504252eb0, < 524599714558da83747c04952d378155c69f5b6b | ≥ 986a075795339c5ea1122ce9290dfd5504252eb0, < de6cc6ec7932bc530f2bb92005dac9123d50659c | ≥ 986a075795339c5ea1122ce9290dfd5504252eb0, < b04578b74f2d3755548fe9e829e3b2a6c6f966a1 | 2.6.39
  • linux_kernel≥ 2.6.39, < 6.12.111 | ≥ 6.13, < 6.18.53 | ≥ 6.19, < 7.2.7 | 7.3:rc1 | 7.3:rc2
Chainguard1 product
  • linux-desktop-7.2-bootc< 7.2.7-r0

4 vendors · 174 products

References

11 links
Show all 11 references