CVE-2026-6100
HIGHCVSS v3.1: 8.1 · EPSS: 0.0052 (40.0 パーセンタイル)
出典データ取得時点:
概要
- 深刻度
- HIGH
- CVSS
- 8.1 v3.1 · NVD
- EPSS
- 0.0052 (40.0 パーセンタイル) · FIRST.org
- CISA KEV
- 非該当
- タイプ
- Use After Free, Out-of-bounds Write · NVD CWE
- 攻撃条件（CVSSベクター）
- ネットワーク権限不要操作不要 · 出典: NVD ベクター
- 公開日
- 2026-04-13 · 更新日: 2026-06-30
- 参照情報
- 参照情報へ移動 (8)
CVSS / EPSS / KEV
出典 — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. データと出典
説明
Use-after-free (UAF) was possible in the `lzma.LZMADecompressor`, `bz2.BZ2Decompressor`, and `gzip.GzipFile` when a memory allocation fails with a `MemoryError` and the decompression instance is re-used. This scenario can be triggered if the process is under memory pressure. The fix cleans up the dangling pointer in this specific error condition. The vulnerability is only present if the program re-uses decompressor instances across multiple decompression calls even after a `MemoryError` is raised during decompression. Using the helper functions to one-shot decompress data such as `lzma.decompress()`, `bz2.decompress()`, `gzip.decompress()`, and `zlib.decompress()` are not affected as a new decompressor instance is used per call. If the decompressor instance is not re-used after an error condition, this usage is similarly not vulnerable.
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。
- パッチ https://github.com/python/cpython/commit/47128e64f98c3a20271138a98c2922bea2a3ee0e
- パッチ https://github.com/python/cpython/commit/6a5f79c8d7bbf22b083b240910c7a8781a59437d
- パッチ https://github.com/python/cpython/commit/8fc66aef6d7b3ae58f43f5c66f9366cc8cbbfcd2
- パッチ https://github.com/python/cpython/commit/c3cf71c3366fe49acb776a639405c0eea6169c20
- パッチ https://github.com/python/cpython/commit/e20c6c9667c99ecaab96e1a2b3767082841ffc8b
- 参照 https://github.com/python/cpython/issues/148395
- 参照 https://github.com/python/cpython/pull/148396
- 参照 https://mail.python.org/archives/list/[email protected]/thread/HTWB2Z6KT5QQX4RY…