CVE-2026-31659

CRITICAL EPSS 31.7%
Published Apr 24, 20262mo ago · Modified Jun 17, 20261w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Apr 24, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: batman-adv: reject oversized global TT response buffers batadv_tt_prepare_tvlv_global_data() builds the allocation length for a global TT response in 16-bit temporaries. When a remote originator advertises a large enough global TT, the TT payload length plus the VLAN header offset can exceed 65535 and wrap before kmalloc(). The full-table response path still uses the original TT payload length when it fills tt_change, so the wrapped allocation is too small and batadv_tt_prepare_tvlv_global_data() writes past the end of the heap object before the later packet-size check runs. Fix this by rejecting TT responses whose TVLV value length cannot fit in the 16-bit TVLV payload length field.

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
31.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 15

VendorProductVersionRange
linuxlinux_kernel*≥3.13.1  –  <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  –  <6.18.23
linuxlinux_kernel*≥6.19  –  <6.19.13
linuxlinux_kernel3.13any
linuxlinux_kernel7.0any
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/2997f4bd1f982e7013709946e00be89b507693fa
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3a359bf5c61d52e7f09754108309d637532164a6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/69d61639bc7e963c3b645e570279d731e7c89062
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7e5d007e0df946bffb8542fb112e0044014a5897
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/95c71365a2222908441b54d6f2c315e0c79fcec3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cf2199171ef799ca7270019125f4a91bd20ad4d9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/de6c1dc3c7d01a152607e6fcecee4d5288283f10
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f970646b9a39539d1bac86822ac78b5915455ea9
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/2997f4bd1f982e7013709946e00be89b507693fa
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3a359bf5c61d52e7f09754108309d637532164a6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/69d61639bc7e963c3b645e570279d731e7c89062
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7e5d007e0df946bffb8542fb112e0044014a5897
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/95c71365a2222908441b54d6f2c315e0c79fcec3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cf2199171ef799ca7270019125f4a91bd20ad4d9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/de6c1dc3c7d01a152607e6fcecee4d5288283f10
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f970646b9a39539d1bac86822ac78b5915455ea9
    Patch