CVE-2024-43889padata: Fix possible divide-by-0 panic in padata_mt_helper()
Updated under an hour ago ()
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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
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from 004ed42638f4428e70ead59d170f3d17ff761a0f before ab8b397d5997d8c37610252528edc54bebf9f6d3; from 004ed42638f4428e70ead59d170f3d17ff761a0f before 8f5ffd2af7274853ff91d6cd62541191d9fbd10d; from 004ed42638f4428e70ead59d170f3d17ff761a0f before a29cfcb848c31f22b4de6a531c3e1d68c9bfe09f; from 004ed42638f4428e70ead59d170f3d17ff761a0f before 924f788c906dccaca30acab86c7124371e1d6f2c; from 004ed42638f4428e70ead59d170f3d17ff761a0f before da0ffe84fcc1627a7dff82c80b823b94236af905; from 004ed42638f4428e70ead59d170f3d17ff761a0f before 6d45e1c948a8b7ed6ceddb14319af69424db730c | CNA record |
Siemens RUGGEDCOM RST2428P siemens:ruggedcom_rst2428p (from the name) | before V3.1 | CISA ADP |
Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family siemens:scalance_xc_300_xr_300_xc_400_xr_500wg_xr_500_family (from the name) | all versions not affected | CISA ADP |
Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family siemens:scalance_xcm_xrm_xch_xrh_300_family (from the name) | before V3.1 | CISA ADP |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | before V1.1.1 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 5.8 before 5.10.224; from 5.11 before 5.15.165; from 5.16 before 6.1.105; from 6.2 before 6.6.46; from 6.7 before 6.10.5; 6.11; 6.11 | NVD |
References
- https://git.kernel.org/stable/c/ab8b397d5997d8c37610252528edc54bebf9f6d3patch
- https://git.kernel.org/stable/c/8f5ffd2af7274853ff91d6cd62541191d9fbd10dpatch
- https://git.kernel.org/stable/c/a29cfcb848c31f22b4de6a531c3e1d68c9bfe09fpatch
- https://git.kernel.org/stable/c/924f788c906dccaca30acab86c7124371e1d6f2cpatch
- https://git.kernel.org/stable/c/da0ffe84fcc1627a7dff82c80b823b94236af905patch
- https://git.kernel.org/stable/c/6d45e1c948a8b7ed6ceddb14319af69424db730cpatch
- https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-355557.html
- https://cert-portal.siemens.com/productcert/html/ssa-613116.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.