7.8

CVE-2024-38630: watchdog: cpu5wdt.c: Fix use-after-free bug caused by cpu5wdt_trigger

Modified
AliasesUBUNTU-CVE-2024-38630DEBIAN-CVE-2024-38630
Published 21-06-2024Last modified 30-10-2026

Vulnerability summary

CVE-2024-38630 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 16.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
0.25%
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 33 · Related 28
LSN-0107-1LSN-0108-1LSN-0109-1MGASA-2024-0263MGASA-2024-0266SUSE-SU-2024:2372-1

Timeline

  1. 21-06-2024
    PublishedVulnerability first disclosed.
  2. 30-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: watchdog: cpu5wdt.c: Fix use-after-free bug caused by cpu5wdt_trigger When the cpu5wdt module is removing, the origin code uses del_timer() to de-activate the timer. If the timer handler is running, del_timer() could not stop it and will return directly. If the port region is released by release_region() and then the timer handler cpu5wdt_trigger() calls outb() to write into the region that is released, the use-after-free bug will happen. Change del_timer() to timer_shutdown_sync() in order that the timer handler could be finished before the port region is released.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

17%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.25% 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.

Ubuntu128 products
  • linuxAll versions (No fix recorded) | < 4.4.0-260.294 | < 4.15.0-230.242 | < 5.4.0-198.218 | < 5.15.0-124.134 | < 6.8.0-44.44
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1137.143 | < 4.4.0-1175.190 | < 4.15.0-1174.187 | < 5.4.0-1134.144 | < 5.15.0-1071.77 | < 6.8.0-1015.16
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 948ed659c0151a605bd126da1e95f350ec5a7956 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 9abe50e8492d1accd7d8dc17991179472d3d4573 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 9b1c063ffc075abf56f63e55d70b9778ff534314 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < f19686d616500cd0d47b30cee82392b53f7f784a | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 573601521277119f2e2ba5f28ae6e87fc594f4d4 | 2.6.12
  • linux_kernel≥ 3.8, < 6.6.33 | ≥ 6.7, < 6.9.4
Debian1 product
  • linuxAll versions (No fix recorded) | < 6.9.7-1

3 vendors · 131 products

References

26 links
Show all 26 references