9.8

CVE-2024-26811: ksmbd: validate payload size in ipc response

Modified
AliasesUBUNTU-CVE-2024-26811DEBIAN-CVE-2024-26811
Published 08-04-2024Last modified 05-08-2026

Vulnerability summary

CVE-2024-26811 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in linux. EPSS estimates a 0.79% chance of exploitation in the next 30 days, higher than 56.4% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.8 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.79%
0%100%
Low · 0.00 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 13 · Related 12
DSA-5658-1USN-6893-1USN-6893-2USN-6893-3USN-6898-1USN-6898-2

Timeline

  1. 08-04-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate payload size in ipc response If installing malicious ksmbd-tools, ksmbd.mountd can return invalid ipc response to ksmbd kernel server. ksmbd should validate payload size of ipc response from ksmbd.mountd to avoid memory overrun or slab-out-of-bounds. This patch validate 3 ipc response that has payload.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.79%

Chance of exploitation in the next 30 days

Percentile

56%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.79% 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: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu110 products
  • linux< 5.15.0-116.126 | < 6.8.0-38.38
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1065.71 | < 6.8.0-1011.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 88b7f1143b15b29cccb8392b4f38e75b7bb3e300 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 51a6c2af9d20203ddeeaf73314ba8854b38d01bd | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < a637fabac554270a851033f5ab402ecb90bc479c | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 76af689a45aa44714b46d1a7de4ffdf851ded896 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < a677ebd8ca2f2632ccdecbad7b87641274e15aac | 5.15
  • linux_kernelEOL< 6.9 | 6.9 | 6.9:rc1 | 6.9:rc2
Debian1 product
  • linux< 6.1.85-1 | < 6.8.9-1

3 vendors · 113 products

References

25 links
Show all 25 references