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CVE-2026-31417— net/x25: Fix overflow when accumulating packets

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于x25_sock.fraglen累积时可能溢出，可能导致数据包处理错误。

CVSS 7.5 · High EPSS 0.83% · P57

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 96fc16370b0bceb289c7e0479bd0540b81e257aa affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 798d613afb64b01a203f448fb0f43c37c6afe79d affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 6e568835ea54a3e1d08e310e34f95d434e739477 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 1734bd85c5e0a7a801295b729efb56b009cb8fc3 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 4e2d1bcef78d21247fe8fef13bc7ed95885df2b5 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 8c92969c197b91c134be27dc3afb64ab468853a9 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< f953f11ccf4afe6feb635c08145f4240d9a6b544 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< a1822cb524e89b4cd2cf0b82e484a2335496a6d9 affected
… +10 more rows
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I. Basic Information for CVE-2026-31417

Vulnerability Information
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Vulnerability Title
net/x25: Fix overflow when accumulating packets
Source: CVE Program / CVE List V5
Vulnerability 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()`.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于x25_sock.fraglen累积时可能溢出，可能导致数据包处理错误。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ 96fc16370b0bceb289c7e0479bd0540b81e257aa -
Linux Linux 2.6.12 -

II. Public POCs for CVE-2026-31417

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III. Intelligence Information for CVE-2026-31417

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Same Patch Batch · Linux · 2026-04-13 · 15 CVEs total

CVE-2026-31414 9.8 CRITICAL netfilter: nf_conntrack_expect: use expect->helper
CVE-2026-31419 7.8 HIGH net: bonding: fix use-after-free in bond_xmit_broadcast()
CVE-2026-31426 7.0 HIGH ACPI: EC: clean up handlers on probe failure in acpi_ec_setup()
CVE-2026-31428 netfilter: nfnetlink_log: fix uninitialized padding leak in NFULA_PAYLOAD
CVE-2026-31427 netfilter: nf_conntrack_sip: fix use of uninitialized rtp_addr in process_sdp
CVE-2026-31425 rds: ib: reject FRMR registration before IB connection is established
CVE-2026-31424 netfilter: x_tables: restrict xt_check_match/xt_check_target extensions for NFPROTO_ARP
CVE-2026-31423 net/sched: sch_hfsc: fix divide-by-zero in rtsc_min()
CVE-2026-31422 net/sched: cls_flow: fix NULL pointer dereference on shared blocks
CVE-2026-31420 bridge: mrp: reject zero test interval to avoid OOM panic
CVE-2026-31421 net/sched: cls_fw: fix NULL pointer dereference on shared blocks
CVE-2026-31418 netfilter: ipset: drop logically empty buckets in mtype_del
CVE-2026-31416 netfilter: nfnetlink_log: account for netlink header size
CVE-2026-31415 ipv6: avoid overflows in ip6_datagram_send_ctl()

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-31417

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