7.7

CVE-2026-64039: linux Incorrect Calculation of Buffer Size

CVSS: 7.7v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-64039DEBIAN-CVE-2026-64039
Published 19-07-2026Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2026-64039 is a high (CVSS 7.7) Incorrect Calculation of Buffer Size vulnerability in linux. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.6% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.7/10
010
High · v3.1 (CVE.org)
EPSS score
0.18%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 43 · Related 43
OPENSUSE-SU-2026:21910-1SUSE-SU-2026:23477-1SUSE-SU-2026:23481-1SUSE-SU-2026:23528-1SUSE-SU-2026:23529-1SUSE-SU-2026:23881-1

Timeline

  1. 19-07-2026
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: drm/msm/snapshot: fix dumping of the unaligned regions The snapshotting code internally aligns data segment to 16 bytes. This works fine for DPU code (where most of the regions are aligned), but fails for snapshotting of the DSI data (because DSI data region is shifted by 4 bytes). Fix the code by removing length alignment and by accurately printing last registers in the region. While reworking the code also fix the 16x memory overallocation in msm_disp_state_dump_regs(). Patchwork: https://patchwork.freedesktop.org/patch/725449/

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

8%

Versus all other CVEs

30-day change

+0.01 pp

From 0.18% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.18%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu155 products
  • linux< 5.15.0-186.196 | < 6.8.0-139.139 | < 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1112.119 | < 6.8.0-1064.67 | < 7.0.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 98659487b845c05b6bed85d881713545db674c7c, < 8fb070cf95847b29ef6cb15ec2c0de2bf4704676 | ≥ 98659487b845c05b6bed85d881713545db674c7c, < cecd34e046121d788a70b5c8b4f8a88916637953 | ≥ 98659487b845c05b6bed85d881713545db674c7c, < 070e40acc59ef7bedba0314f59971ba87fcc8ab0 | ≥ 98659487b845c05b6bed85d881713545db674c7c, < 1ef79be774706dddcfcace0331fa7ff32a73c73e | ≥ 98659487b845c05b6bed85d881713545db674c7c, < cdd1aaf0ee962f50810b9aef7928f2313989d55f | ≥ 98659487b845c05b6bed85d881713545db674c7c, < 0c90ececfad3fc5c4c43a75ece0e2d736ab3def1 | ≥ 98659487b845c05b6bed85d881713545db674c7c, < 76824d2467feb1828b745d6add2541918d7be3da | 5.14
  • linux_kernel≥ 5.14, < 5.15.209 | ≥ 5.16, < 6.1.175 | ≥ 6.2, < 6.6.142 | ≥ 6.7, < 6.12.92 | ≥ 6.13, < 6.18.34 | ≥ 6.19, < 7.0.11 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3 | 7.1:rc4
Debian1 product
  • linux< 6.1.176-1 | < 6.12.94-1 | < 7.0.12-1

3 vendors · 158 products

References

43 links
Show all 43 references