CVE-2026-68121
Qualys 위협 인텔 · 심각도 5/5 · QID 765984 · SUSE
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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.
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.
타임라인
- NVD 공개
- 첫 보도 The Hacker News · CISA, 실제 공격에 악용된 리눅스 커널 취약점 3건 경고
- 최근 보도 (총 2건) The Hacker News · ⚡ 주간 요약: 시스코 제로데이, AI 에이전트 RCE, ClickFix 공…
날짜 정보 없는 신호: 공개 PoC 3건
벡터: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
공개 익스플로잇 / PoC
- GitHub 공개 PoC 3건 — 대표 레포 ↗