5.5

CVE-2026-43457: mctp: i2c: fix skb memory leak in receive path

Analyzed
AliasesUBUNTU-CVE-2026-43457DEBIAN-CVE-2026-43457
Published 08-05-2026Last modified 11-05-2026

Vulnerability summary

CVE-2026-43457 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.11% chance of exploitation in the next 30 days, higher than 1.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.11%
0%100%
Low · -0.05 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 21 · Related 21
OPENSUSE-SU-2026:21388-1SUSE-SU-2026:22742-1SUSE-SU-2026:22769-1SUSE-SU-2026:22812-1SUSE-SU-2026:22835-1SUSE-SU-2026:4935-1

Timeline

  1. 08-05-2026
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: mctp: i2c: fix skb memory leak in receive path When 'midev->allow_rx' is false, the newly allocated skb isn't consumed by netif_rx(), it needs to free the skb directly.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.11%

Chance of exploitation in the next 30 days

Percentile

1%

Versus all other CVEs

30-day change

Decrease -0.05 pp

From 0.16% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu130 products
  • linux< 6.8.0-136.136 | All versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1061.64 | All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ f5b8abf9fc3dacd7529d363e26fe8230935d65f8, < 0fb2adbdd5c03e8c9ebcdc48afd414b2724c85eb | ≥ f5b8abf9fc3dacd7529d363e26fe8230935d65f8, < d7900a43b0a314a645ca0a2adf45928dbc7001f4 | ≥ f5b8abf9fc3dacd7529d363e26fe8230935d65f8, < 9f81be2ab9d8e4744871bfb3e868ef413413829f | ≥ f5b8abf9fc3dacd7529d363e26fe8230935d65f8, < 1ec54187e1aa40a4cfa2b265e9a311179f24b98d | ≥ f5b8abf9fc3dacd7529d363e26fe8230935d65f8, < 1b1be322342a6b0085bf6ee52235e5ac9834ec25 | ≥ f5b8abf9fc3dacd7529d363e26fe8230935d65f8, < e3f5e0f22cfc2371e7471c9fd5b4da78f9df7c69 | 5.18
  • linux_kernel≥ 5.18, < 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 · 133 products

References

24 links
Show all 24 references