7.5

CVE-2026-43373: linux

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-43373DEBIAN-CVE-2026-43373
Published 08-05-2026Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2026-43373 is a high (CVSS 7.5) vulnerability in linux. EPSS estimates a 0.72% chance of exploitation in the next 30 days, higher than 53.1% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.72%
0%100%
Low · +0.21 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 39 · Related 39
OPENSUSE-SU-2026:21388-1SUSE-SU-2026:22742-1SUSE-SU-2026:22769-1SUSE-SU-2026:22809-1SUSE-SU-2026:22810-1SUSE-SU-2026:22812-1

Timeline

  1. 08-05-2026
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net: ncsi: fix skb leak in error paths Early return paths in NCSI RX and AEN handlers fail to release the received skb, resulting in a memory leak. Specifically, ncsi_aen_handler() returns on invalid AEN packets without consuming the skb. Similarly, ncsi_rcv_rsp() exits early when failing to resolve the NCSI device, response handler, or request, leaving the skb unfreed.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.72%

Chance of exploitation in the next 30 days

Percentile

53%

Versus all other CVEs

30-day change

+0.21 pp

From 0.50% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.72%

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

Ubuntu156 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-136.136
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1061.64
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 138635cc27c9737f940c3aa80912ff7a61c825af, < 9891d7f4f1ede473c54b49776ae07755083eef06 | ≥ 138635cc27c9737f940c3aa80912ff7a61c825af, < fef5aa6e3bcf3c8053307642663a63b7362d7552 | ≥ 138635cc27c9737f940c3aa80912ff7a61c825af, < 81d6aee32f8f7bbc175c05dbf61f4430bfb88c4a | ≥ 138635cc27c9737f940c3aa80912ff7a61c825af, < 59962588197863d0d746879f193905c0c6b3df49 | ≥ 138635cc27c9737f940c3aa80912ff7a61c825af, < 553366c271479c0d571dd1bb5d1bcde4747fb82e | ≥ 138635cc27c9737f940c3aa80912ff7a61c825af, < b70c4e5e711931cdd56e6e905737b72f1e649189 | ≥ 138635cc27c9737f940c3aa80912ff7a61c825af, < 87138dde2d6937b12b967f28fe598a7d59000ae4 | ≥ 138635cc27c9737f940c3aa80912ff7a61c825af, < 5c3398a54266541610c8d0a7082e654e9ff3e259 | 4.8
  • linux_kernel≥ 4.8, < 5.10.253 | ≥ 5.11, < 5.15.203 | ≥ 5.16, < 6.1.167 | ≥ 6.2, < 6.6.130 | ≥ 6.7, < 6.12.78 | ≥ 6.13, < 6.18.19 | ≥ 6.19, < 6.19.9 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.10-1

3 vendors · 159 products

References

39 links
Show all 39 references