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CVE-2026-46303: Linux

8.2

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: isofs: validate Rock Ridge CE continuation extent against volume size rock_continue() reads rs->cont_extent verbatim from the Rock Ridge CE record and passes it to sb_bread() without checking that the block number is within the mounted ISO 9660 volume. commit e595447e177b ("[PATCH] rock.c: handle corrupted directories") added cont_offset and cont_size rejection for the CE continuation but did not validate the extent block number itself. commit f54e18f1b831 ("isofs: Fix infinite looping over CE entries") later capped the CE chain length at RR_MAX_CE_ENTRIES = 32 but again left the block number unchecked. With a crafted ISO mounted via udisks2 (desktop optical auto-mount) or via CAP_SYS_ADMIN mount, rs->cont_extent can therefore point at an out-of-range block or at blocks belonging to an adjacent filesystem on the same block device. sb_bread() on an out-of-range block returns NULL cleanly via the block layer EIO path, so there is no memory-safety violation. For in-range reads of adjacent- filesystem data, the CE buffer is parsed as Rock Ridge records and only the text of SL sub-records reaches userspace through readlink(), which makes the info-leak channel narrow and difficult to exploit; still, rejecting the malformed CE outright matches the rejection shape already present in the same function for cont_offset and cont_size. Add an ISOFS_SB(sb)->s_nzones bounds check to rock_continue() next to the existing offset/size rejection, printing the same corrupted-directory-entry notice.

    Засегнати продукти

    • Linux Linux: f54e18f1b831c92f6512d2eedb224cd63d607d3d преди 8356fb821016797f5677cbeee5ddc0d32a95b4be; f54e18f1b831c92f6512d2eedb224cd63d607d3d преди d582e12378bc1637f337622feef762f53c43fd57; f54e18f1b831c92f6512d2eedb224cd63d607d3d преди bf1bc673c587f5ef7e9c09b94aea7c5a7847d4d9; f54e18f1b831c92f6512d2eedb224cd63d607d3d преди c9b37c8b73f6368e4750e5ccb0632c380b43c6e5; f54e18f1b831c92f6512d2eedb224cd63d607d3d преди 22b36fa081f38ab397c7697f9d539211b51a0cfc; f54e18f1b831c92f6512d2eedb224cd63d607d3d преди e69da8eeab74b4f4505024c38a17bce060fe7df8; f54e18f1b831c92f6512d2eedb224cd63d607d3d преди ef048470c90bc8c1b8318bb2ce329da9ef64b9fe; f54e18f1b831c92f6512d2eedb224cd63d607d3d преди a36d990f591320e9dd379ab30063ebfe91d47e1f; 08313e26e06d4aa9ce1cbba1a8e359e9cab9ad56; 212c4d33ca83e2144064fe9c2911607fbed5386f; 96e44adce250199ec9b2b928be66365779ff1b59; 1fe5620fcd6c2f0a4a927ee10c8e53196da392f3; fbce0d7dc8965c9fb8d411862040239d4a768c71; 8190393a88f2b0321263a54f2a9eb5a2aa43be7e; 486aa789eadcf44ed87f972b209299c516454693; b6d20edb6e7cedb4eedb9e0193d20dd488ebae84; 2.6.32.66 преди 2.6.33; 3.2.67 преди 3.3; 3.4.107 преди 3.5; 3.10.64 преди 3.11; 3.12.36 преди 3.13; 3.14.28 преди 3.15; 3.17.8 преди 3.18; 3.18.2 преди 3.19
    • Linux Linux: 3.19; преди 3.19; 5.10.258 до 5.10.*; 5.15.209 до 5.15.*; 6.1.175 до 6.1.*; 6.6.140 до 6.6.*; 6.12.88 до 6.12.*; 6.18.30 до 6.18.*; 7.0.7 до 7.0.*; от 7.1 нататък
    • Siemens: още 4 продукта, добавени от Siemens

      SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP, SIMATIC S7-1500 TM MFP - GNU/Linux subsystem, SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

    История

    • 8 юни 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-46303: Linux | freedomonline.bg