7.8

CVE-2026-64134: linux NULL Pointer Dereference

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2026-64134DEBIAN-CVE-2026-64134
Published 19-07-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-64134 is a high (CVSS 7.8) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.2% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.13%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 27 · Related 27
OPENSUSE-SU-2026:21910-1SUSE-SU-2026:23881-1SUSE-SU-2026:23887-1SUSE-SU-2026:23897-1SUSE-SU-2026:23902-1SUSE-SU-2026:4120-1

Timeline

  1. 19-07-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: Don't setup bogus iov_iter for silencing At transition to the iov_iter for PCM data transfer, we blindly applied the iov_iter setup also for silencing (i.e. data = NULL), and it leads to a calculation of bogus iov_iter. Fortunately this didn't cause troubles on most of architectures but it goes wrong on RISC-V now, causing a NULL dereference. Handle the NULL data case to treat the silencing in interleaved_copy() for addressing the bug above. noninterleaved_copy() has already the NULL data handling, so it doesn't need changes.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

0.00 pp

From 0.13% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.13%

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

Ubuntu140 products
  • linux< 6.8.0-139.139 | < 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 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≥ cf393babb37a1679a1ec1d864df1090353465e23, < 41a766c647294842c9b17672449f8e011048cba9 | ≥ cf393babb37a1679a1ec1d864df1090353465e23, < ce836587e594af39ff048d9b29dee0f5f10692c9 | ≥ cf393babb37a1679a1ec1d864df1090353465e23, < feff0251386aa6bb180a0a1cf7c1f91ba868113d | ≥ cf393babb37a1679a1ec1d864df1090353465e23, < c9f6768515818d71bdfc20119a81f3332c53b9c6 | ≥ cf393babb37a1679a1ec1d864df1090353465e23, < e4d3386b74fba8e01280484b67ee481ece00201e | 6.6
  • linux_kernel≥ 6.6, < 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< 6.12.94-1 | < 7.0.12-1

3 vendors · 143 products

References

29 links
Show all 29 references