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CVE-2026-89698: 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: nfsd: widen nfsd_genl_rqstp address fields to sockaddr_storage struct nfsd_genl_rqstp declares rq_daddr and rq_saddr as plain "struct sockaddr" (16 bytes). When an IPv6 NFS client is connected, nfsd_genl_rpc_status_compose_msg() casts these fields to "struct sockaddr_in6 *" (28 bytes) and reads sin6_addr at offset 8..24, which extends 8 bytes past the end of the 16-byte sockaddr field into the adjacent rq_flags member. The 16-byte nla_put_in6_addr then ships 8 bytes of truncated IPv6 address followed by 8 bytes of rq_flags to userspace via the NFSD_A_RPC_STATUS_SADDR6/DADDR6 netlink attributes. This is reachable by any unprivileged process in the network namespace because NFSD_CMD_RPC_STATUS_GET uses GENL_CMD_CAP_DUMP without GENL_ADMIN_PERM. Fix by widening rq_daddr and rq_saddr to struct sockaddr_storage so the IPv6 casts operate within bounds, copying sizeof(struct sockaddr_storage) bytes in the memcpy calls so the full address is captured, and zero-initializing the genl_rqstp stack variable to prevent leaking uninitialized tail bytes through netlink.

    Засегнати продукти

    • Linux Linux: bd9d6a3efa9709e653aafbeb859289feccb8e70c преди 9a2e791639a1c5cac3f219b0d2632835d8f88d27; bd9d6a3efa9709e653aafbeb859289feccb8e70c преди 03c512f22d3fbe7a3767d6df5e3d88b8e7c105e5; bd9d6a3efa9709e653aafbeb859289feccb8e70c преди dcb69ad0dafb4a24b825183bb94055d5be8a10bd; bd9d6a3efa9709e653aafbeb859289feccb8e70c преди a99d720ed2a5258564e5e9d5f39f3184a030d354
    • Linux Linux: 6.7; преди 6.7; 6.12.111 до 6.12.*; 6.18.51 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-2026-89698: Linux | freedomonline.bg