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CVE-2026-98850: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: net/packet: prevent TX_RING byte count overflow tpacket_snd() drains every SEND_REQUEST frame in a TX ring and adds each valid packet length to the signed int len_sum. Userspace can recycle completed frames concurrently, so a single blocking send call is not bounded by the ring size. After enough successful transmissions len_sum wraps into the negative range. In particular, 65536 65535-byte frames followed by a 65007-byte frame produce 0xfffffdef, or -EIOCBQUEUED. sock_sendmsg_nosec() treats that as an impossible return and triggers a BUG. On systems configured to panic on oops, a CAP_NET_RAW holder can panic the host kernel. Stop before the next frame would make the byte count exceed INT_MAX. The positive short count leaves that frame pending for a later send call. A two-thread TPACKET_V2 reproducer triggered the BUG on an arm64 build of Linux 7.3-rc4. With this change, the same reproducer returned the expected positive short count without an oops.

    Засегнати продукти

    • Linux Linux: 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 преди 1e6ee93cea4b77253b1b81eb5759899f959ebee3; 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 преди 70fefff0801d4c5405e515592d1e7ad1351530cd; 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 преди 4848c175b5984e6358bcca794ac1dee4d527efcc; 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 преди ae169d318d5d23bac76ece90a7e2b5cb760ed043; 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 преди be12b221c0301111eeb023be04add3c6ad7c21fe; 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 преди 69ca64bbb528898916f309552053c32a04a36ebc; 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 преди 9fd63d284e251332f4874ef9023cde472f315f86; 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 преди 2cf81fc9505b148b1b70068303ea6ea4b1212403
    • Linux Linux: 2.6.31; преди 2.6.31; 5.10.273 до 5.10.*; 5.15.224 до 5.15.*; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.113 до 6.12.*; 6.18.56 до 6.18.*; 7.2.10 до 7.2.*; от 7.3 нататък

    История

    • 18 октомври 2026 Публикувано

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    Първоизточници

    CVE-2026-98850: Linux | freedomonline.bg