5.5

CVE-2024-43889: padata: Fix possible divide-by-0 panic in padata_mt_helper()

Modified
AliasesUBUNTU-CVE-2024-43889DEBIAN-CVE-2024-43889
Published 26-08-2024Last modified 15-10-2026

Vulnerability summary

CVE-2024-43889 is a medium (CVSS 5.5) Divide By Zero vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.6% 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
0.24%
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 26 · Related 18
DLA-3912-1DLA-4008-1MGASA-2024-0309MGASA-2024-0310RHSA-2024:8856RHSA-2024:8870

Timeline

  1. 26-08-2024
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: padata: Fix possible divide-by-0 panic in padata_mt_helper() We are hit with a not easily reproducible divide-by-0 panic in padata.c at bootup time. [ 10.017908] Oops: divide error: 0000 1 PREEMPT SMP NOPTI [ 10.017908] CPU: 26 PID: 2627 Comm: kworker/u1666:1 Not tainted 6.10.0-15.el10.x86_64 #1 [ 10.017908] Hardware name: Lenovo ThinkSystem SR950 [7X12CTO1WW]/[7X12CTO1WW], BIOS [PSE140J-2.30] 07/20/2021 [ 10.017908] Workqueue: events_unbound padata_mt_helper [ 10.017908] RIP: 0010:padata_mt_helper+0x39/0xb0 : [ 10.017963] Call Trace: [ 10.017968] <TASK> [ 10.018004] ? padata_mt_helper+0x39/0xb0 [ 10.018084] process_one_work+0x174/0x330 [ 10.018093] worker_thread+0x266/0x3a0 [ 10.018111] kthread+0xcf/0x100 [ 10.018124] ret_from_fork+0x31/0x50 [ 10.018138] ret_from_fork_asm+0x1a/0x30 [ 10.018147] </TASK> Looking at the padata_mt_helper() function, the only way a divide-by-0 panic can happen is when ps->chunk_size is 0. The way that chunk_size is initialized in padata_do_multithreaded(), chunk_size can be 0 when the min_chunk in the passed-in padata_mt_job structure is 0. Fix this divide-by-0 panic by making sure that chunk_size will be at least 1 no matter what the input parameters are.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

15%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.24% 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.

Ubuntu117 products
  • linux< 5.15.0-125.135 | < 6.8.0-50.51
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1072.78 | < 6.8.0-1020.22
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 004ed42638f4428e70ead59d170f3d17ff761a0f, < ab8b397d5997d8c37610252528edc54bebf9f6d3 | ≥ 004ed42638f4428e70ead59d170f3d17ff761a0f, < 8f5ffd2af7274853ff91d6cd62541191d9fbd10d | ≥ 004ed42638f4428e70ead59d170f3d17ff761a0f, < a29cfcb848c31f22b4de6a531c3e1d68c9bfe09f | ≥ 004ed42638f4428e70ead59d170f3d17ff761a0f, < 924f788c906dccaca30acab86c7124371e1d6f2c | ≥ 004ed42638f4428e70ead59d170f3d17ff761a0f, < da0ffe84fcc1627a7dff82c80b823b94236af905 | ≥ 004ed42638f4428e70ead59d170f3d17ff761a0f, < 6d45e1c948a8b7ed6ceddb14319af69424db730c | 5.8
  • linux_kernel≥ 5.8, < 5.10.224 | ≥ 5.11, < 5.15.165 | ≥ 5.16, < 6.1.105 | ≥ 6.2, < 6.6.46 | ≥ 6.7, < 6.10.5 | 6.11:rc1 | 6.11:rc2
Debian1 product
  • linux< 6.1.106-1 | < 6.10.6-1

3 vendors · 120 products

References

26 links
Show all 26 references