CVE-2026-31684

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-31684
In the Linux kernel, the following vulnerability has been resolved: net: sched: act_csum: validate nested VLAN headers tcf_csum_act() walks nested VLAN headers directly from skb->data when an skb still carries in-payload VLAN tags. The current code reads vlan->h_vlan_encapsulated_proto and then pulls VLAN_HLEN bytes without first ensuring that the full VLAN header is present in the linear area. If only part of an inner VLAN header is linearized, accessing h_vlan_encapsulated_proto reads past the linear area, and the following skb_pull(VLAN_HLEN) may violate skb invariants. Fix this by requiring pskb_may_pull(skb, VLAN_HLEN) before accessing and pulling each nested VLAN header. If the header still is not fully available, drop the packet through the existing error path.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/0410c619e86551677fb79887a38eccad3f5a0725
https://git.kernel.org/stable/c/3d165d975305cf76ff0b10a3c798fb31e5f5f9a5 Patch
https://git.kernel.org/stable/c/46c07ad50fa2f4ba7663ee1b72b75ad7ad45cf09
https://git.kernel.org/stable/c/886469b6455611a511aa6013e957e15e50577513
https://git.kernel.org/stable/c/a69738efea0996d05a3c7d2178551b891744df1b Patch
https://git.kernel.org/stable/c/c842743d073bdd683606cb414eb0ca84465dd834 Patch
https://git.kernel.org/stable/c/eb3765b90eb8f2a3d6310a80c14a9e57ec4267a2 Patch
https://git.kernel.org/stable/c/ec4930979b3f7bbeb7af5744599fc6603a4dba62 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
History

01 Jun 2026, 17:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/0410c619e86551677fb79887a38eccad3f5a0725 -
  • () https://git.kernel.org/stable/c/46c07ad50fa2f4ba7663ee1b72b75ad7ad45cf09 -
  • () https://git.kernel.org/stable/c/886469b6455611a511aa6013e957e15e50577513 -

06 May 2026, 21:11

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/3d165d975305cf76ff0b10a3c798fb31e5f5f9a5 - () https://git.kernel.org/stable/c/3d165d975305cf76ff0b10a3c798fb31e5f5f9a5 - Patch
References () https://git.kernel.org/stable/c/a69738efea0996d05a3c7d2178551b891744df1b - () https://git.kernel.org/stable/c/a69738efea0996d05a3c7d2178551b891744df1b - Patch
References () https://git.kernel.org/stable/c/c842743d073bdd683606cb414eb0ca84465dd834 - () https://git.kernel.org/stable/c/c842743d073bdd683606cb414eb0ca84465dd834 - Patch
References () https://git.kernel.org/stable/c/eb3765b90eb8f2a3d6310a80c14a9e57ec4267a2 - () https://git.kernel.org/stable/c/eb3765b90eb8f2a3d6310a80c14a9e57ec4267a2 - Patch
References () https://git.kernel.org/stable/c/ec4930979b3f7bbeb7af5744599fc6603a4dba62 - () https://git.kernel.org/stable/c/ec4930979b3f7bbeb7af5744599fc6603a4dba62 - Patch
CPE cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CWE NVD-CWE-noinfo
First Time Linux
Linux linux Kernel

27 Apr 2026, 14:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/eb3765b90eb8f2a3d6310a80c14a9e57ec4267a2 -

25 Apr 2026, 09:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-04-25 09:16

Updated : 2026-06-01 17:16

NVD link : CVE-2026-31684

Mitre link : CVE-2026-31684

CVE.ORG link : CVE-2026-31684

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo