7.8

CVE-2024-38667: linux Out-of-bounds Write

CVSS: 7.8v3.1HighAnalyzed
AliasesUBUNTU-CVE-2024-38667DEBIAN-CVE-2024-38667
Published 24-06-2024Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2024-38667 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in linux. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 12.7% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
0.23%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 16 · Related 14
MGASA-2024-0263MGASA-2024-0266USN-6999-1USN-6999-2USN-7004-1USN-7005-1

Timeline

  1. 24-06-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: riscv: prevent pt_regs corruption for secondary idle threads Top of the kernel thread stack should be reserved for pt_regs. However this is not the case for the idle threads of the secondary boot harts. Their stacks overlap with their pt_regs, so both may get corrupted. Similar issue has been fixed for the primary hart, see c7cdd96eca28 ("riscv: prevent stack corruption by reserving task_pt_regs(p) early"). However that fix was not propagated to the secondary harts. The problem has been noticed in some CPU hotplug tests with V enabled. The function smp_callin stored several registers on stack, corrupting top of pt_regs structure including status field. As a result, kernel attempted to save or restore inexistent V context.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.23%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

0.00 pp

From 0.23% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.23%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu116 products
  • linux< 5.15.0-127.137 | < 6.8.0-44.44
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1073.79 | < 6.8.0-1015.16
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 2875fe0561569f82d0e63658ccf0d11ce7da8922, < ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e | ≥ 2875fe0561569f82d0e63658ccf0d11ce7da8922, < 3090c06d50eaa91317f84bf3eac4c265e6cb8d44 | ≥ 2875fe0561569f82d0e63658ccf0d11ce7da8922, < 0c1f28c32a194303da630fca89481334b9547b80 | ≥ 2875fe0561569f82d0e63658ccf0d11ce7da8922, < a638b0461b58aa3205cd9d5f14d6f703d795b4af | 5.7
  • linux_kernel≥ 5.7, < 6.1.93 | ≥ 6.2, < 6.6.33 | ≥ 6.7, < 6.9.4 | 6.10:rc1
Debian1 product
  • linux< 6.1.94-1 | < 6.9.7-1

3 vendors · 119 products

References

23 links
Show all 23 references