CVE-2026-68121

Katalog CVE

CVSS 7.8 · High EPSS 0,30%

Skor CVSS 3.1 7.8 (High) menurut CNA.

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: pppoe: reload header pointer after dev_hard_header() pppoe_sendmsg() saves a pointer to the PPPoE header before calling dev_hard_header(). Device header callbacks are allowed to reallocate the skb head, invalidating pointers into it. This can happen when a send is blocked in copy_from_user() while the first non-Ethernet port is added to an empty team device. The team's delegated GRE header callback then expands the skb head. PPPoE subsequently writes six bytes through the stale pointer into the freed head. Reload the PPPoE header through the skb's network-header offset after device header creation. pskb_expand_head() updates that offset when it relocates the head.

Rincian

Terbit di NVD

10 Agustus 2026

Terakhir diubah

19 Agustus 2026

Status NVD

Received

CVSS 3.1

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

EPSS (30 hari)

0,30% peluang dieksploitasi; lebih tinggi dari 20,7% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/6866abf59976d273164a6624234d96a967280223
• https://git.kernel.org/stable/c/6eed5ae7887a93160803d2b81ff88e75eefd4a4c
• https://git.kernel.org/stable/c/7a56e7c9b08e08fd55a1bcada24cf4fe3782b722
• https://git.kernel.org/stable/c/7e9fbd7f96bcde63a7c798fe16b38cedee7a1501
• https://git.kernel.org/stable/c/ba3409369c5413cdf0dcbf3a928f76b48e8c3e6a
• https://git.kernel.org/stable/c/bed4caecd723693f750e13adbb2c42ca1249a3fd
• https://git.kernel.org/stable/c/e6493a4d1ee17595766165fa446d45b7e0c318d0
• https://git.kernel.org/stable/c/e9c238f6fe42fb1b4dba3a578277de32cb487937