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CVE-2026-98417— net: xfrm: reject unrepresentable espintcp transport headers

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.

在 Linux 内核中，已修复以下漏洞： net: xfrm: 拒绝不可表示的 ESP-in-TCP 传输层头 ESP-in-TCP 可能会生成 xfrm 数据包，其传输层头偏移量在流解析器剥离 TCP 封装后不再适合。直接重置传输层头会截断该偏移量，并触发 skb 警告路径。 应使用谨慎的传输层头辅助函数，当偏移量无法表示时，通过现有的 XFRM 错误路径丢弃该 skb。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux e27cca96cd68fa2c6814c90f9a1cfd36bb68c593< d37a5b87577c4b4c1a1dcb000a9dff1df2cf886b affected
e27cca96cd68fa2c6814c90f9a1cfd36bb68c593< 6c29681207bc213188afa603dff2d55e7178a341 affected
e27cca96cd68fa2c6814c90f9a1cfd36bb68c593< 4a8243fd2e21980fa3fd10c0610e9155057cebd3 affected
e27cca96cd68fa2c6814c90f9a1cfd36bb68c593< b2b84e73e0386ad0b4f9b8d3afde343e761f5275 affected
e27cca96cd68fa2c6814c90f9a1cfd36bb68c593< 327b2a457dd7d5445f7395f371f3c65de79bd5ce affected
e27cca96cd68fa2c6814c90f9a1cfd36bb68c593< cce630c751279e974fa0bb574d80575e0cc7e8f3 affected
e27cca96cd68fa2c6814c90f9a1cfd36bb68c593< 206f396f46149dc8bc4dfd2b54b9879ba3ee1d7d affected
e27cca96cd68fa2c6814c90f9a1cfd36bb68c593< 96f01b53c2d05e003b040892256de54a586e8529 affected
… +10 more rows
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I. Basic Information for CVE-2026-98417

Vulnerability Information
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Vulnerability Title
net: xfrm: reject unrepresentable espintcp transport headers
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: xfrm: reject unrepresentable espintcp transport headers ESP-in-TCP can hand xfrm packets whose transport header offset no longer fits after the stream parser trims the TCP envelope. The plain transport header reset truncates that offset and triggers the skb warning path. Use the careful transport-header helper and drop the skb through the existing XFRM error path when the offset cannot be represented.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 ~ d37a5b87577c4b4c1a1dcb000a9dff1df2cf886b -
Linux Linux 5.6 -

II. Public POCs for CVE-2026-98417

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-98417

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Other References for CVE-2026-98417 (8)

Same Patch Batch · Linux · 2026-10-14 · 46 CVEs total

CVE-2026-98398 locking/lockdep: Invalidate stale class_cache entries for zapped classes
CVE-2026-98396 powerpc: Do not restore KUAP in arch_exit_to_user_mode_prepare()
CVE-2026-98393 net: ipv4: Fix UDP length overflow with PMTU discover and big MTU
CVE-2026-98391 drm/xe: Guard page-fault worker with runtime PM check
CVE-2026-98389 drm/amdgpu: skip gfx switch_power_profile during GPU reset
CVE-2026-98388 exec: do_close_on_exec() before taking exec_update_lock
CVE-2026-98387 s390/crypto: Fix skcipher_walk return code handling in aes_s390
CVE-2026-98386 scsi: qla2xxx: Use memset_io() to clear QLAFX00 request ring slot
CVE-2026-98390 x86/amd_node: Avoid divide by zero on virtualized systems
CVE-2026-98397 platform/x86: x86-android-tablets: hold device reference for secondary fwnode teardown
CVE-2026-98395 powerpc/entry: Fix irq_soft_mask corruption on replayed interrupt exit
CVE-2026-98399 s390/ipl: Fix NULL deref in dump_reipl without re-IPL parm block
CVE-2026-98400 s390/ipl: Fix NULL deref in kdump without re-IPL parm block
CVE-2026-98402 net: icmp: avoid invalid transport header access in icmp_send tracepoint
CVE-2026-98401 net: iptunnel: fix stale transport header during tunnel decapsulation
CVE-2026-98403 s390/boot: Avoid IPL parameter append past command line
CVE-2026-98404 drm/virtio: Fix a NULL vs ERR_PTR() bug in virtio_gpu_user_framebuffer_create()
CVE-2026-98405 smb: client: fix missing iov bounds check in parse_posix_sids()
CVE-2026-98406 wifi: mac80211: avoid WARN in set_bitrate_mask when sdata not in driver
CVE-2026-98408 watchdog: rzv2h: Avoid division by zero

Showing top 20 of 46 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98417

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