Yüksek CVSS 7.8 CISA KEV

CVE-2026-46300: Linux Kernel: Paket İşleme Güvenlik Açığı

Yayın: 23 Mayıs 2026 15:17 · Güncelleme: 7 Kasım 2026 01:45

Linux çekirdeğinde ağ paketlerinin birleştirilmesi sırasında veri bütünlüğü bozulabiliyor. Saldırganlar, şifrelenmiş veriyi düzgün kontrol etmeden doğrudan bellekte çözebilir. Hemen en güncel Linux çekirdeği yamasına geçilmelidir.

Türkçe özet yapay zekâ ile üretildi.

Açıklama (NVD)

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.

Özet bilgiler

Ürün: Linux Linux Kernel
CVSS v3.1: 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: %16,13 (yüzdelik 97)
CWE: CWE-787
Yama: Mevcut
KEV: Eklenme: 2026-10-28 · Son tarih: 2026-10-31

Gerekli aksiyon: 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.

Etkilenen sürümler

Ürün	Başlangıç	Bitiş	Düzeltildi
linux-linux-kernel	3.9	5.10.257	—
linux-linux-kernel	5.11	—	5.15.208
linux-linux-kernel	5.16	—	6.1.174
linux-linux-kernel	6.2	—	6.6.141
linux-linux-kernel	6.7	—	6.12.91
linux-linux-kernel	6.13	—	6.18.33
linux-linux-kernel	6.19	—	7.0.10
linux-linux-kernel	7.1	7.1	—
linux-linux-kernel	7.1	7.1	—
linux-linux-kernel	7.1	7.1	—
linux-linux-kernel	7.1	7.1	—
siemens-simatic-s7-1500-cpu-1518-4-pn-dp-mfp-firmware	3.1.5	3.1.6	—
redhat-openshift-container-platform	4.12	—	4.12.91
redhat-openshift-container-platform	4.13	—	4.13.67
redhat-openshift-container-platform	4.14	—	4.14.68
redhat-openshift-container-platform	4.15	—	4.15.65
redhat-openshift-container-platform	4.16	—	4.16.63
redhat-openshift-container-platform	4.17	—	4.17.55
redhat-openshift-container-platform	4.18	—	4.18.43
redhat-openshift-container-platform	4.19	—	4.19.33
redhat-openshift-container-platform	4.20	—	4.20.24
redhat-openshift-container-platform	4.21	—	4.21.17
redhat-enterprise-linux	6.0	6.0	—
redhat-enterprise-linux	7.0	7.0	—
redhat-enterprise-linux	8.0	8.0	—
redhat-enterprise-linux	9.0	9.0	—
redhat-enterprise-linux	10.0	10.0	—
redhat-enterprise-linux-aus	8.4	8.4	—
redhat-enterprise-linux-aus	8.6	8.6	—
redhat-enterprise-linux-eus	8.4	8.4	—

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