CVE-2026-63994

Katalog CVE

CVSS 9.8 · Critical EPSS 0,51%

Kerentanan Use After Free pada linux kernel. Skor CVSS 3.1 9.8 (Critical) menurut CNA.

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: tunnels: load network headers after skb_cow() in iptunnel_pmtud_build_icmp[v6]() Sashiko found that iptunnel_pmtud_build_icmp() and iptunnel_pmtud_build_icmpv6() were caching ip_hdr() and ipv6_hdr() before an skb_cow() call which can reallocate skb->head. Fix this possible UAF by initializing the local variables after the skb_cow() call. Remove skb_reset_network_header() calls which were not needed.

Rincian

Terbit di NVD

19 Juli 2026

Terakhir diubah

7 Oktober 2026

Status NVD

Analyzed

CVSS 3.1

9.8 (Critical), sumber CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-416: Use After Free

EPSS (30 hari)

0,51% peluang dieksploitasi; lebih tinggi dari 42,1% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/50750d86a2e5266aba0c295483b3397843198b11 patch
• https://git.kernel.org/stable/c/6dff77899b9e9fe5d854abda3a98ad04e7229ef7 patch
• https://git.kernel.org/stable/c/7254aef4d1a7e18e887af9010e2f2dc34806789b patch
• https://git.kernel.org/stable/c/76cd9398a0470257ab765bdf5f358a2af2e17934 patch
• https://git.kernel.org/stable/c/95b6d772bfe788331d9742d73eaa12e113b2adc4 patch
• https://git.kernel.org/stable/c/b4bc94353050b1fa7b702bd4c6600710dd926cff patch
• https://git.kernel.org/stable/c/bf8b3f34c37c162357138e7c0942723b8b94fed1 patch
• https://git.kernel.org/stable/c/f3f204541f280a6ecb04503a0d6794d93990ca43 patch