NVD / CVE Program· CNA Linux

CVE-2024-26945: crypto: iaa - Fix nr_cpus < nr_iaa case

Noroxi assessment

Priority: Monitor (action score 33/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.23% (FIRST EPSS).
Someone with local access to the system can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
Fixed version: Linux Linux 5a7e89d3315d1be86aff8a8bf849023cda6547f7, a5ca1be7f9817de4e93085778b3ee2219bdc2664.

Low priority for now. Upgrade to Linux Linux 5a7e89d3315d1be86aff8a8bf849023cda6547f7, a5ca1be7f9817de4e93085778b3ee2219bdc2664 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: crypto: iaa - Fix nr_cpus < nr_iaa case If nr_cpus < nr_iaa, the calculated cpus_per_iaa will be 0, which causes a divide-by-0 in rebalance_wq_table(). Make sure cpus_per_iaa is 1 in that case, and also in the nr_iaa == 0 case, even though cpus_per_iaa is never used if nr_iaa == 0, for paranoia.

HighCVSS 8.4 · v3.1—No exploit Fix available

BDU:2025-07412

Published: May 1, 2024
Updated: Jun 17, 2026
EPSS: 0.2% · 14th percentile
CWE: CWE-369

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 33 / 40 · 8.4 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.2%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

linux linux kernelbefore 6.8.3
linux linux kernel6.9

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

Linux Linux
- 6.8affected
- ea7a5cbb43696cfacf73e61916d1860ac30b5b2f and later · before a5ca1be7f9817de4e93085778b3ee2219bdc2664affected · git
- ea7a5cbb43696cfacf73e61916d1860ac30b5b2f and later · before 5a7e89d3315d1be86aff8a8bf849023cda6547f7affected · git
- before 6.8not affected · semver
- 6.8.3 and later · up to and including 6.8.*not affected · semver
- 6.9 and laternot affected · original_commit_for_fix

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:13	linux	before 6.8.9-1	6.8.9-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
90Now
CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
89Now
CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
85Now

Published before and after this one in the same product

← EarlierCVE-2024-26943May 1, 2024 · nouveau/dmem: handle kcalloc() allocation failure
22Monitor
← EarlierCVE-2024-26944May 1, 2024 · btrfs: zoned: fix use-after-free in do_zone_finish()
31Monitor
Later →CVE-2024-26946May 1, 2024 · kprobes/x86: Use copy_from_kernel_nofault() to read from unsafe address
22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Linux Linux	5a7e89d3315d1be86aff8a8bf849023cda6547f7	Vendor (CNA)
Linux Linux	a5ca1be7f9817de4e93085778b3ee2219bdc2664	Vendor (CNA)
debian:linux	6.8.9-1 · Debian:13	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2024-269410 days apartdrm/dp: Fix divide-by-zero regression on DP MST unplug with nouveau
22Monitor
CVE-2024-270590 days apartUSB: usb-storage: Prevent divide-by-0 error in isd200_ata_command
22Monitor
CVE-2024-3592218 days apartfbmon: prevent division by zero in fb_videomode_from_videomode()
22Monitor
CVE-2024-3592518 days apartblock: prevent division by zero in blk_rq_stat_sum()
22Monitor
CVE-2021-4736320 days apartnexthop: Fix division by zero while replacing a resilient group
22Monitor
CVE-2021-4749521 days apartusbnet: sanity check for maxpacket
22Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Someone with local access to the system can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Local
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-369 · Divide By Zero

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

Fix✗ → ✓Sep 28, 2026, 10:11 PM UTC

For records you follow, these changes also arrive as notifications. →

References

git.kernel.org/stable/c/5a7e89d3315d1be86aff8a8bf849023cda6547f7

Show all references (1 more)

git.kernel.org/stable/c/a5ca1be7f9817de4e93085778b3ee2219bdc2664

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records