CVE-2026-53081
HIGHCVSS v3.1: 7.8 · EPSS: 0.0012 (2.1 パーセンタイル)
出典データ取得時点:
概要
- 深刻度
- HIGH
- CVSS
- 7.8 v3.1 · NVD
- EPSS
- 0.0012 (2.1 パーセンタイル) · FIRST.org
- CISA KEV
- 非該当
- 攻撃条件（CVSSベクター）
- 操作不要 · 出典: NVD ベクター
- 公開日
- 2026-06-24 · 更新日: 2026-06-28
- 参照情報
- 参照情報へ移動 (4)
CVSS / EPSS / KEV
出典 — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. データと出典
説明
In the Linux kernel, the following vulnerability has been resolved: bpf: Enforce regsafe base id consistency for BPF_ADD_CONST scalars When regsafe() compares two scalar registers that both carry BPF_ADD_CONST, check_scalar_ids() maps their full compound id (aka base | BPF_ADD_CONST flag) as one idmap entry. However, it never verifies that the underlying base ids, that is, with the flag stripped are consistent with existing idmap mappings. This allows construction of two verifier states where the old state has R3 = R2 + 10 (both sharing base id A) while the current state has R3 = R4 + 10 (base id C, unrelated to R2). The idmap creates two independent entries: A->B (for R2) and A|flag->C|flag (for R3), without catching that A->C conflicts with A->B. State pruning then incorrectly succeeds. Fix this by additionally verifying base ID mapping consistency whenever BPF_ADD_CONST is set: after mapping the compound ids, also invoke check_ids() on the base IDs (flag bits stripped). This ensures that if A was already mapped to B from comparing the source register, any ADD_CONST derivative must also derive from B, not an unrelated C.
参照情報
NVDが列挙した参照URLを、リンクのホスト・パターンに対する機械的な一致でグループ化したもの。ラベルはリンクの種別のみを示します。
- 参照 https://git.kernel.org/stable/c/13c02881e49aac4c82b261faa26db9edf2567231
- 参照 https://git.kernel.org/stable/c/2f2ec8e7730e21fc9bd49e0de9cdd58213ea24d0
- 参照 https://git.kernel.org/stable/c/691adf738817275368ed56311b7d798d617823a3
- 参照 https://git.kernel.org/stable/c/7d73c72cccac651acc891377a5e623e4021c6380