Description
In the Linux kernel, the following vulnerability has been resolved: bpf, xdp: move offload check into dev_xdp_install() bpf_xdp_link_update() calls dev_xdp_install() directly and skips dev_xdp_attach(), so the checks in dev_xdp_attach() do not run. A user can make an XDP link with a normal program and then swap in an offloaded or device-bound program with BPF_LINK_UPDATE, which puts it on the software path. dev_xdp_install() is the one place all three paths go through: "ip link set xdp" and BPF_LINK_CREATE reach it via dev_xdp_attach(), and BPF_LINK_UPDATE calls it directly. So move the program checks (offloaded, bound to another device, device-bound in generic mode, native vs generic, DEVMAP and CPUMAP) there, and keep only the netlink-flag check (XDP_FLAGS_UPDATE_IF_NOEXIST) in dev_xdp_attach().
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74 to < bd06033625ec20b7bdec43d21f776fc1a5e9000eaffected026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74 to < 486dbe7efec2be19cd3625be282f7f6b34a3f2c5affected026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74 to < f14b774ec9bd52d0f4ec29a6597a35fd107197f9affected026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74 to < ea7b35dcc9430293b861bc7bad0c546f193c85f9affected026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74 to < 03022dd874070768a7099f18b1944c633641315faffected026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74 to < ad27ed7d2309419a129078d781504f486b1b469aaffected
Linux Linux
Default version status: affected
5.9affected0 to < 5.9unaffected6.6.160 to ≤ 6.6.*unaffected6.12.113 to ≤ 6.12.*unaffected6.12.114 to ≤ 6.12.*unaffected6.18.52 to ≤ 6.18.*unaffected7.2.6 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/bd06033625ec20b7bdec43d21f776fc1a5e9000e ↗
- https://git.kernel.org/stable/c/486dbe7efec2be19cd3625be282f7f6b34a3f2c5 ↗
- https://git.kernel.org/stable/c/f14b774ec9bd52d0f4ec29a6597a35fd107197f9 ↗
- https://git.kernel.org/stable/c/ea7b35dcc9430293b861bc7bad0c546f193c85f9 ↗
- https://git.kernel.org/stable/c/03022dd874070768a7099f18b1944c633641315f ↗
- https://git.kernel.org/stable/c/ad27ed7d2309419a129078d781504f486b1b469a ↗