CVE-2026-43336

HIGH EPSS 34.1%
Published May 8, 20261mo ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published May 8, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
34.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 13

VendorProductVersionRange
linuxlinux_kernel*≥4.2  –  <5.10.253
linuxlinux_kernel*≥5.11  –  <5.15.203
linuxlinux_kernel*≥5.16  –  <6.1.169
linuxlinux_kernel*≥6.2  –  <6.6.135
linuxlinux_kernel*≥6.7  –  <6.12.82
linuxlinux_kernel*≥6.13  –  <6.18.22
linuxlinux_kernel*≥6.19  –  <6.19.12
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/066c760acead1fb743bae294dbd89f479ae43b9b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1933249263c3a98df79992f61a566476e4163bcc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1d761e5a7340c46479fb2399598f331e4fe2c633
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/91999af43ca2125e3b2c18fcfc02912ada02efc3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b416a4245f04a450c67a13e6d96056c37c5b33fe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bd62d9b44464a6c20a34a74068e7a784d0afa04a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e5046823f8fa3677341b541a25af2fcb99a5b1e0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e90ee961af515a484f091678ce58a4c3f7b73b02
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/066c760acead1fb743bae294dbd89f479ae43b9b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1933249263c3a98df79992f61a566476e4163bcc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1d761e5a7340c46479fb2399598f331e4fe2c633
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/91999af43ca2125e3b2c18fcfc02912ada02efc3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b416a4245f04a450c67a13e6d96056c37c5b33fe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bd62d9b44464a6c20a34a74068e7a784d0afa04a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e5046823f8fa3677341b541a25af2fcb99a5b1e0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e90ee961af515a484f091678ce58a4c3f7b73b02
    Patch