CVE-2026-74458: can: kvaser_usb_leaf: kvaser_usb_leaf_wait_cmd(): validate received command extents

Received
AliasesUBUNTU-CVE-2026-74458DEBIAN-CVE-2026-74458
Published 15-08-2026Last modified 19-08-2026

Vulnerability summary

CVE-2026-74458 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.2% of scored vulnerabilities.

Priority
Insufficient evidence

No CVSS vector published; no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.18%
0%100%
Low · -0.04 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 10 · Related 7
SUSE-SU-2026:5091-1USN-8875-1USN-8875-2USN-8876-1USN-8877-1USN-8878-1

Timeline

  1. 15-08-2026
    PublishedVulnerability first disclosed.
  2. 19-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: can: kvaser_usb_leaf: kvaser_usb_leaf_wait_cmd(): validate received command extents The wait and bulk receive paths walk variable-length commands from a USB buffer. A nonzero command shorter than CMD_HEADER_LEN can still be dispatched, and the wait path copies a matching command into a fixed caller-owned struct kvaser_cmd using the device-provided length. Reject nonzero commands that do not contain the fixed header or that extend beyond the current USB buffer item. In the wait path, also reject a matching command that exceeds the destination before copying it.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

Decrease -0.04 pp

From 0.22% on 06-10-2026

06-10-202605-11-2026

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

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: not stated in public data.

Ubuntu169 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 7.0.0-42.42
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 7.0.0-1016.17
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.187-1 | < 6.12.105-1 | < 7.1.8-1
  • linux-6.12< 6.12.107-1~deb12u1
Linux1 product
  • linux≥ 080f40a6fa28dab299da7a652e444b1e2d9231e7, < c00ec53d7dec08134e97071850cc00ef000c5b77 | ≥ 080f40a6fa28dab299da7a652e444b1e2d9231e7, < d9e91672526ffa279709b15490118aea1bdee714 | ≥ 080f40a6fa28dab299da7a652e444b1e2d9231e7, < 72f96c2942f11a0ae8663adcb3d9ee986e07d4fa | ≥ 080f40a6fa28dab299da7a652e444b1e2d9231e7, < 695aea154bb2d453e6daada1510972fafd075285 | ≥ 080f40a6fa28dab299da7a652e444b1e2d9231e7, < 3d0897ec623e422695d70d80ae456f89476c5328 | ≥ 080f40a6fa28dab299da7a652e444b1e2d9231e7, < 185cb1fa38142a3cbf223dd8b3abb24217f330d3 | ≥ 080f40a6fa28dab299da7a652e444b1e2d9231e7, < 21f0465fd86d77794aaed8e05f833634f68d178d | ≥ 080f40a6fa28dab299da7a652e444b1e2d9231e7, < 0293dd153f9dbc1ddf5dacdccc76b363bce4a8ee | 3.8

3 vendors · 172 products

References

21 links
Show all 21 references