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CVE-2026-89616: Linux

7.5

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: fix info-leak on partial LZNT decompress in ni_read_frame() ni_read_frame() decompresses an LZNT $DATA frame into the vmapped target pages and then trusts decompress_lznt()'s return value: unc_size = decompress_lznt(frame_ondisk, ondisk_size, frame_mem, frame_size); if ((ssize_t)unc_size < 0) err = unc_size; else if (!unc_size || unc_size > frame_size) err = -EINVAL; decompress_lznt() stops as soon as the compressed stream is exhausted (e.g. a zero chunk header) and returns the number of bytes it actually wrote, which may be far less than frame_size. The bytes between unc_size and frame_size are never written. The only memset() that follows zeroes the region beyond i_valid; when the frame lies entirely within the file's valid size that memset() does not run, so the gap retains whatever was in the just-vmapped pages. All pages are then marked uptodate and returned to userspace, disclosing uninitialized (recently-freed) kernel page memory. A crafted compressed file whose stream decompresses to only a few bytes leaks the remainder of every frame on a plain read(2), which is enough to recover kernel pointers and defeat KASLR. Zero the [unc_size, frame_size) tail immediately after a successful LZNT decompress so the remainder reads back as zero.

    Засегнати продукти

    • Linux Linux: 4342306f0f0d5ff4315a204d315c1b51b914fca5 преди 7d60a4c49af4d5cb88aa7cbf998d0408bd415055; 4342306f0f0d5ff4315a204d315c1b51b914fca5 преди cd40eee4923d104ebec9ac7513b971bc441e431d; 4342306f0f0d5ff4315a204d315c1b51b914fca5 преди 77d8efd04745cda23858546afdbd9d07b591758e; 4342306f0f0d5ff4315a204d315c1b51b914fca5 преди 0f699ddb290a24b37e1bc9bf1e3c9dbccf564bea; 4342306f0f0d5ff4315a204d315c1b51b914fca5 преди 376ee45659a4b943df672ad275c63da00655f929; 4342306f0f0d5ff4315a204d315c1b51b914fca5 преди 4a1b39b2e10eb8de86265e80cf2be4396bc1dce4; 4342306f0f0d5ff4315a204d315c1b51b914fca5 преди 35d1ea92c7d946e2ebdbe36cdb2c969c8704bebd
    • Linux Linux: 5.15; преди 5.15; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.109 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; от 7.3 нататък

    История

    • 11 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-89616: Linux | freedomonline.bg