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CVE-2026-46300

גבוהה 7.8 מנוצלת בשטח (KEV)

ניצול פעיל מאומת — קטלוג CISA KEV

שם
Linux Kernel Missing Initialization of a Variable Vulnerability
נוסף לקטלוג
יעד טיפול (פדרלי)
פעולה נדרשת
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.

תיאור (מקור, אנגלית)

In the Linux kernel, the following vulnerability has been resolved: net: skbuff: preserve shared-frag marker during coalescing skb_try_coalesce() can attach paged frags from @from to @to. If @from has SKBFL_SHARED_FRAG set, the resulting @to skb can contain the same externally-owned or page-cache-backed frags, but the shared-frag marker is currently lost. That breaks the invariant relied on by later in-place writers. In particular, ESP input checks skb_has_shared_frag() before deciding whether an uncloned nonlinear skb can skip skb_cow_data(). If TCP receive coalescing has moved shared frags into an unmarked skb, ESP can see skb_has_shared_frag() as false and decrypt in place over page-cache backed frags. Propagate SKBFL_SHARED_FRAG when skb_try_coalesce() transfers paged frags. The tailroom copy path does not need the marker because it copies bytes into @to's linear data rather than transferring frag descriptors.

מדדים

CVSS 3.1
7.8 (HIGH) מקור הציון: NVD CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS — סבירות ניצול
16% (אחוזון 97) נכון ל-1 בנובמבר 2026
CWE
CWE-787, CWE-456, CWE-123

מוצרים מושפעים

linux: linux kernel; siemens: simatic s7-1500 cpu 1518-4 pn\/dp mfp firmware; siemens: simatic s7-1500 cpu 1518-4 pn\/dp mfp; redhat: openshift container platform; redhat: enterprise linux; redhat: enterprise linux aus; redhat: enterprise linux eus; redhat: enterprise linux tus; redhat: enterprise linux update services for sap solutions

קישורים