5.5

CVE-2023-52941: can: isotp: split tx timer into transmission and timeout

Analyzed
AliasesUBUNTU-CVE-2023-52941DEBIAN-CVE-2023-52941
Published 27-03-2025Last modified 23-05-2026

Vulnerability summary

CVE-2023-52941 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 12% 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
0.21%
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 5 · Related 4
RHSA-2025:20518SUSE-SU-2025:1176-1SUSE-SU-2025:1183-1SUSE-SU-2025:1195-1SUSE-SU-2025:1241-1

Timeline

  1. 27-03-2025
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: can: isotp: split tx timer into transmission and timeout The timer for the transmission of isotp PDUs formerly had two functions: 1. send two consecutive frames with a given time gap 2. monitor the timeouts for flow control frames and the echo frames This led to larger txstate checks and potentially to a problem discovered by syzbot which enabled the panic_on_warn feature while testing. The former 'txtimer' function is split into 'txfrtimer' and 'txtimer' to handle the two above functionalities with separate timer callbacks. The two simplified timers now run in one-shot mode and make the state transitions (especially with isotp_rcv_echo) better understandable.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.21% 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

No weakness data has been published for this record.

Affected systems

Version check

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

Ubuntu77 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
  • linux-aws-5.19All versions (No fix recorded)
Linux2 products
  • linux≥ 866337865f3747c68a3e7bb837611e39cec1ecd6, < cae4c9bc35f72af5d4a079bb9d9fd62c4088a411 | ≥ 866337865f3747c68a3e7bb837611e39cec1ecd6, < 4f027cba8216f42a18b544842efab134f8b1f9f4 | 3cb476cf834edca47f4470c276feb0f519401fb7 | ≥ 6.0.9, < 6.1 | 6.1
  • linux_kernel≥ 6.0.9, < 6.1 | ≥ 6.1.1, < 6.1.11 | 6.1 | 6.1:rc5 | 6.1:rc6 | 6.1:rc7 | 6.1:rc8 | 6.2:rc1 | 6.2:rc2 | 6.2:rc3 | 6.2:rc4 | 6.2:rc5 | 6.2:rc6
Debian1 product
  • linux< 6.1.11-1

3 vendors · 80 products

References

6 links