CVE-2026-43304

CRITICAL EPSS 39.1%
Published May 8, 20261mo ago · Modified Jun 17, 20261w ago
9.8 CVSS 3.1
Critical
Find Similar
Published May 8, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: libceph: define and enforce CEPH_MAX_KEY_LEN When decoding the key, verify that the key material would fit into a fixed-size buffer in process_auth_done() and generally has a sane length. The new CEPH_MAX_KEY_LEN check replaces the existing check for a key with no key material which is a) not universal since CEPH_CRYPTO_NONE has to be excluded and b) doesn't provide much value since a smaller than needed key is just as invalid as no key -- this has to be handled elsewhere anyway.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
39.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 6

VendorProductVersionRange
linuxlinux_kernel*≥5.11  –  <5.15.202
linuxlinux_kernel*≥5.16  –  <6.1.165
linuxlinux_kernel*≥6.2  –  <6.6.128
linuxlinux_kernel*≥6.7  –  <6.12.75
linuxlinux_kernel*≥6.13  –  <6.18.16
linuxlinux_kernel*≥6.19  –  <6.19.6

References 7

  • git.kernel.org https://git.kernel.org/stable/c/1b275bd49e58752efb83767a5d1aed41356c5e64
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6405e8c680974bb74e2c98d5249fb52c7b12a6c6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8d745d38c88ecbed95f6b2b39857bf89f35a3244
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ac431d597a9bdfc2ba6b314813f29a6ef2b4a3bf
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c1a0f5f1e5e7e98c36a362ec3d1fcfd9932931ed
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d82467c07b03a27c3c5469b62bb3b726305a80bb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e1dc45d97975f9db65694d234fbddf1915176e16
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/1b275bd49e58752efb83767a5d1aed41356c5e64
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6405e8c680974bb74e2c98d5249fb52c7b12a6c6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8d745d38c88ecbed95f6b2b39857bf89f35a3244
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ac431d597a9bdfc2ba6b314813f29a6ef2b4a3bf
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c1a0f5f1e5e7e98c36a362ec3d1fcfd9932931ed
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d82467c07b03a27c3c5469b62bb3b726305a80bb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e1dc45d97975f9db65694d234fbddf1915176e16
    Patch