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  • changed/a9/kernel-5.14.0-611.54.5.el9_7 cbd86e4598

    Bump version to 5.14.0-611.54.5

    Ghost released this 2026-05-14 12:59:35 +00:00 | -160 commits to c8 since this release

    net: skbuff: propagate shared-frag marker through frag-transfer helpers

    Replace 611.54.4's partial fix (which was a backport of Hyunwoo Kim's
    v1 patch covering only __pskb_copy_fclone() and skb_try_coalesce())
    with a backport of the upstream v3 patch:
    https://lore.kernel.org/all/agW4vC0r8QOUKtRT@v4bel/

    v3 also covers skb_shift() (the new hunk added in v2) and
    skb_gro_receive() / skb_gro_receive_list() (the audit follow-up
    suggested by Sultan Alsawaf in agVpIsaSherjHTYg@sultan-box).

    All five sites moved frag descriptors between skbs without
    propagating the SKBFL_SHARED_FRAG marker, so destinations could end
    up referencing externally-owned or page-cache-backed pages while
    reporting skb_has_shared_frag() as false. Combined with ESP-over-UDP
    and UDP GRO, or any nf_dup_ipv4 / xt_TEE caller, this lets an
    unprivileged user trigger in-place ESP decryption over root-owned
    page-cache pages (CVE-2026-46300, "Fragnesia").

    Tree-adapted: skb_gro_receive_list() is still a static helper in
    net/ipv4/udp_offload.c on RHEL 9 (not promoted to a global GRO
    helper in net/core/gro.c as in upstream v3); skb_shift() still uses
    the open-coded skb->len -= shiftlen block instead of skb_len_add().

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