7.5

CVE-2026-43336: linux

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-43336DEBIAN-CVE-2026-43336
Published 08-05-2026Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2026-43336 is a high (CVSS 7.5) vulnerability in linux. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 35.6% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.43%
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 39 · Related 39
OPENSUSE-SU-2026:21388-1SUSE-SU-2026:22521-1SUSE-SU-2026:22522-1SUSE-SU-2026:22665-1SUSE-SU-2026:22666-1SUSE-SU-2026:22742-1

Timeline

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

Description

In the Linux kernel, the following vulnerability has been resolved: lib/crypto: chacha: Zeroize permuted_state before it leaves scope Since the ChaCha permutation is invertible, the local variable 'permuted_state' is sufficient to compute the original 'state', and thus the key, even after the permutation has been done. While the kernel is quite inconsistent about zeroizing secrets on the stack (and some prominent userspace crypto libraries don't bother at all since it's not guaranteed to work anyway), the kernel does try to do it as a best practice, especially in cases involving the RNG. Thus, explicitly zeroize 'permuted_state' before it goes out of scope.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.43%

Chance of exploitation in the next 30 days

Percentile

36%

Versus all other CVEs

30-day change

0.00 pp

From 0.43% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.43%

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

No weakness data has been published for this record.

Affected systems

Ubuntu157 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-136.136
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1061.64
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ c08d0e647305c3f8f640010a56c9e4bafb9488d3, < e90ee961af515a484f091678ce58a4c3f7b73b02 | ≥ c08d0e647305c3f8f640010a56c9e4bafb9488d3, < b416a4245f04a450c67a13e6d96056c37c5b33fe | ≥ c08d0e647305c3f8f640010a56c9e4bafb9488d3, < bd62d9b44464a6c20a34a74068e7a784d0afa04a | ≥ c08d0e647305c3f8f640010a56c9e4bafb9488d3, < 066c760acead1fb743bae294dbd89f479ae43b9b | ≥ c08d0e647305c3f8f640010a56c9e4bafb9488d3, < 1d761e5a7340c46479fb2399598f331e4fe2c633 | ≥ c08d0e647305c3f8f640010a56c9e4bafb9488d3, < 1933249263c3a98df79992f61a566476e4163bcc | ≥ c08d0e647305c3f8f640010a56c9e4bafb9488d3, < 91999af43ca2125e3b2c18fcfc02912ada02efc3 | ≥ c08d0e647305c3f8f640010a56c9e4bafb9488d3, < e5046823f8fa3677341b541a25af2fcb99a5b1e0 | 4.2
  • linux_kernel≥ 4.2, < 5.10.253 | ≥ 5.11, < 5.15.203 | ≥ 5.16, < 6.1.169 | ≥ 6.2, < 6.6.135 | ≥ 6.7, < 6.12.82 | ≥ 6.13, < 6.18.22 | ≥ 6.19, < 6.19.12 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.12-1

3 vendors · 160 products

References

39 links
Show all 39 references