CVE-2024-26943: linux NULL Pointer Dereference
Vulnerability summary
CVE-2024-26943 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12.3% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 26 · Related 26Timeline
- 01-05-2024PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: nouveau/dmem: handle kcalloc() allocation failure The kcalloc() in nouveau_dmem_evict_chunk() will return null if the physical memory has run out. As a result, if we dereference src_pfns, dst_pfns or dma_addrs, the null pointer dereference bugs will happen. Moreover, the GPU is going away. If the kcalloc() fails, we could not evict all pages mapping a chunk. So this patch adds a __GFP_NOFAIL flag in kcalloc(). Finally, as there is no need to have physically contiguous memory, this patch switches kcalloc() to kvcalloc() in order to avoid failing allocations.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.22%
Chance of exploitation in the next 30 days
Percentile
12%
Versus all other CVEs
30-day change
0.00 pp
From 0.22% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu82 products
- linux< 6.8.0-35.35
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 6.8.0-1009.9
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 249881232e1471d28b68f9a3829acc14d150cf5d, < 9acfd8b083a0ffbd387566800d89f55058a68af2 | ≥ 249881232e1471d28b68f9a3829acc14d150cf5d, < 2a84744a037b8a511d6a9055f3defddc28ff4a4d | ≥ 249881232e1471d28b68f9a3829acc14d150cf5d, < 5e81773757a95fc298e96cfd6d4700f07b6192a2 | ≥ 249881232e1471d28b68f9a3829acc14d150cf5d, < 3e82f7383e0b82a835e6b6b06a348b2bc4e2c2ee | ≥ 249881232e1471d28b68f9a3829acc14d150cf5d, < 16e87fe23d4af6df920406494ced5c0f4354567b | 6.1
- linux_kernel≥ 6.1, < 6.1.84 | ≥ 6.2, < 6.6.24 | ≥ 6.7, < 6.7.12 | ≥ 6.8, < 6.8.3 | 6.9:rc1
Debian1 product
- linux< 6.1.85-1 | < 6.7.12-1
3 vendors · 85 products
