High severity · published Apr 13, 2026
CVE-2026-31417
net/x25: Fix overflow when accumulating packets
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
In the Linux kernel, the following vulnerability has been resolved:
net/x25: Fix overflow when accumulating packets
Add a check to ensure that `x25_sock.fraglen` does not overflow.
The `fraglen` also needs to be resetted when purging `fragment_queue` in
`x25_clear_queues()`.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 39% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
2.6.12.1 before 5.10.253; 5.11 before 5.15.203; 5.16 before 6.1.168; 6.2 before 6.6.134; 6.7 before 6.12.81; 6.13 before 6.18.22; +13 more · source: NVD
LI
Linux · Linux
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 96fc16370b0bceb289c7e0479bd0540b81e257aa; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 798d613afb64b01a203f448fb0f43c37c6afe79d; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 6e568835ea54a3e1d08e310e34f95d434e739477; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 1734bd85c5e0a7a801295b729efb56b009cb8fc3; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 4e2d1bcef78d21247fe8fef13bc7ed95885df2b5; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 8c92969c197b91c134be27dc3afb64ab468853a9; +3 more · source: vendor
SS
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.6; V3.1.5; V3.1.7; V3.1.6; V3.1.5; V3.1.7 · source: CISA
SS
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · Siemens
V3.1.6; V3.1.5; V3.1.7; V3.1.6; V3.1.5; V3.1.7 · source: CISA
SS
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.6; V3.1.5; V3.1.7 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-31417
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-31417
Patch
https://git.kernel.org/stable/c/1734bd85c5e0a7a801295b729efb56b009cb8fc3
Patch
https://git.kernel.org/stable/c/4e2d1bcef78d21247fe8fef13bc7ed95885df2b5
Patch
https://git.kernel.org/stable/c/6e568835ea54a3e1d08e310e34f95d434e739477
Patch
https://git.kernel.org/stable/c/798d613afb64b01a203f448fb0f43c37c6afe79d
Patch
https://git.kernel.org/stable/c/8c92969c197b91c134be27dc3afb64ab468853a9
Patch
https://git.kernel.org/stable/c/96fc16370b0bceb289c7e0479bd0540b81e257aa
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