7.8

CVE-2024-44949: parisc: fix a possible DMA corruption

Modified
AliasesUBUNTU-CVE-2024-44949DEBIAN-CVE-2024-44949
Published 04-09-2024Last modified 05-08-2026

Vulnerability summary

CVE-2024-44949 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 14% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.23%
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 4
DLA-4008-1DSA-5818-1MGASA-2024-0309MGASA-2024-0310

Timeline

  1. 04-09-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: parisc: fix a possible DMA corruption ARCH_DMA_MINALIGN was defined as 16 - this is too small - it may be possible that two unrelated 16-byte allocations share a cache line. If one of these allocations is written using DMA and the other is written using cached write, the value that was written with DMA may be corrupted. This commit changes ARCH_DMA_MINALIGN to be 128 on PA20 and 32 on PA1.1 - that's the largest possible cache line size. As different parisc microarchitectures have different cache line size, we define arch_slab_minalign(), cache_line_size() and dma_get_cache_alignment() so that the kernel may tune slab cache parameters dynamically, based on the detected cache line size.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.23%

Chance of exploitation in the next 30 days

Percentile

14%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.23% 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

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu75 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
  • linux-aws-5.19All versions (No fix recorded)
Linux2 products
  • linux≥ a01fece2e4185ac173abd16d10304d73d47ebf00, < 00baca74fb5879e5f9034b6156671301f500f8ee | ≥ a01fece2e4185ac173abd16d10304d73d47ebf00, < 642a0b7453daff0295310774016fcb56d1f5bc7f | ≥ a01fece2e4185ac173abd16d10304d73d47ebf00, < 533de2f470baac40d3bf622fe631f15231a03c9f | ≥ a01fece2e4185ac173abd16d10304d73d47ebf00, < 7ae04ba36b381bffe2471eff3a93edced843240f | 4.4
  • linux_kernel< 6.6.46 | ≥ 6.7, < 6.10.5 | 6.11:rc1
Debian1 product
  • linux< 6.1.119-1 | < 6.10.6-1

3 vendors · 78 products

References

10 links