CVE-2026-53266

KEV の登録内容

vulnerabilityName

Linux Kernel Out-of-Bounds Write Vulnerability

vendorProject

Linux

product

Kernel

dateAdded

2026-09-18

shortDescription

Linux Kernel contains an out-of-bounds write vulnerability in the ebtables SNAT target which allows an ARP sender hardware address rewrite to write directly into a nonlinear socket-buffer fragment backed by a splice-imported file page. The impacted product(s) could be end-of-life (EoL) and/or end-of-service (EoS). Users are advised to discontinue use and/or transition to a supported version.

requiredAction

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

dueDate

2026-09-21

knownRansomwareCampaignUse

Unknown

forensicTriage

Yes

notes

This vulnerability affects an open-source component, third-party library, protocol, or proprietary implementation that could be used by different products. For more information, please see: ; https://git.kernel.org/stable/c/bf84ad7c7a9ede46e31afaa41a1ba06a159e8c87; https://git.kernel.org/stable/c/76280b78cc9f23bdc6438e10ad6dff148ef8375b; https://git.kernel.org/stable/c/b7e91939ba9be805a62a257fa4e227dffbb88fa0; https://git.kernel.org/stable/c/afd64b59c3de9bbbdd3759e834fdc55cda716e0b; https://git.kernel.org/stable/c/153ea96c806aea395daba907a4f88480b6ad5093; https://git.kernel.org/stable/c/b18675263db1147c8e1cab625400c13a0d87bd2d; https://git.kernel.org/stable/c/c9b5ff59feffb92a147a84a5aa28acd2cb8ff4c5; https://git.kernel.org/stable/c/67ba971ae02514d85818fe0c32549ab4bfa3bf49 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-53266

cwes

CWE-787

初めて観測: 2026-10-02T21:06:48Z / 最後に観測: 2026-10-02T21:06:48Z(last_observed_at。値の変更を最後に確認した時刻)

観測した変更

取り込み開始以降、KEV の値の変更は観測していません。

CVE レコード(CVE Program)

state

PUBLISHED

datePublished

2026-06-25T08:39:53.190Z

dateUpdated

2026-09-19T03:56:22.274Z

CNA の affected

• Linux Linux (63137bc5882a1882c553d389fdeeeace86ee1741 〜 <bf84ad7c7a9ede46e31afaa41a1ba06a159e8c87; 63137bc5882a1882c553d389fdeeeace86ee1741 〜 <76280b78cc9f23bdc6438e10ad6dff148ef8375b; 63137bc5882a1882c553d389fdeeeace86ee1741 〜 <b7e91939ba9be805a62a257fa4e227dffbb88fa0; 63137bc5882a1882c553d389fdeeeace86ee1741 〜 <afd64b59c3de9bbbdd3759e834fdc55cda716e0b; 63137bc5882a1882c553d389fdeeeace86ee1741 〜 <153ea96c806aea395daba907a4f88480b6ad5093; 63137bc5882a1882c553d389fdeeeace86ee1741 〜 <b18675263db1147c8e1cab625400c13a0d87bd2d; 63137bc5882a1882c553d389fdeeeace86ee1741 〜 <c9b5ff59feffb92a147a84a5aa28acd2cb8ff4c5; 63137bc5882a1882c553d389fdeeeace86ee1741 〜 <67ba971ae02514d85818fe0c32549ab4bfa3bf49; 2f3839075a5f8dcf116c1abe35b36b018ac62445; 51ba2945a8ef65ae437c8f9ba05f0343aa82ae5b; b7d23c2c87584eb429f115c078ed511be8b18e29; 5.4.73 〜 <5.5; 5.8.17 〜 <5.9; 5.9.2 〜 <5.10)
• Linux Linux (5.10; 0 〜 <5.10 (unaffected); 5.10.259 〜 <=5.10.* (unaffected); 5.15.210 〜 <=5.15.* (unaffected); 6.1.176 〜 <=6.1.* (unaffected); 6.6.143 〜 <=6.6.* (unaffected); 6.12.94 〜 <=6.12.* (unaffected); 6.18.36 〜 <=6.18.* (unaffected); 7.0.13 〜 <=7.0.* (unaffected); 7.1 〜 <=* (unaffected))

KEV と CNA で製品の表記が異なる。KEV の vendorProject・product と CNA の affected が、大文字小文字を無視した包含で一致しなかった(機械的な照合で、どちらが正しいかは判定していない)。

外部のページ

• cve.org の CVE-2026-53266
• NVD の CVE-2026-53266