CVE-2026-81002Critical· 9.8▾ MidnightIn the Linux kernel, the following vulnerability has been resolved: xdp: fix zero-copy frame layout xdp_convert_zc_to_xdp_frame() clones an XSK packet into an order-0 page and advertises PAGE_SIZE as its frame size. It allows the copi…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 53.9 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
— → 5.9
none → medium
— → 5.9
none → medium
— → 9.8
none → critical
9.8 → 5.9
critical → medium
9.8 → 7
critical → high
0.2% → 0.8%
7 → 9.8
high → critical
Last analysed / modified upstream
In the Linux kernel, the following vulnerability has been resolved:
xdp: fix zero-copy frame layout
xdp_convert_zc_to_xdp_frame() clones an XSK packet into an order-0 page and advertises PAGE_SIZE as its frame size. It allows the copied frame to occupy the page tail needed by skb_shared_info and records zero headroom even when metadata separates the frame header from packet data. An AF_XDP zero-copy packet redirected through cpumap can therefore make the skb overlap skb_shared_info or place it beyond the allocated page.
Limit the copied layout to SKB_WITH_OVERHEAD(PAGE_SIZE) and include the metadata length in frame headroom. Redirect callers already handle a NULL conversion result.
BUG: KASAN: slab-out-of-bounds in skb_gro_receive Write of size 4 at addr ffff88800cf37004 by task cpumap/1/map:1/146 Call Trace: skb_gro_receive (net/core/gro.c:174) udp_gro_receive (net/ipv4/udp_offload.c:812) inet_gro_receive (net/ipv4/af_inet.c:1539) dev_gro_receive (net/core/gro.c:515) gro_receive_skb (net/core/gro.c:633) cpu_map_kthread_run (kernel/bpf/cpumap.c:395) kthread (kernel/kthread.c:436) ret_from_fork (arch/x86/kernel/process.c:164) ret_from_fork_asm (arch/x86/entry/entry_64.S:255) Kernel panic - not syncing: KASAN: panic_on_warn set ...
Linux >= b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 < dcb6db9ca6515fcd3e00c93ec5e27dc7a0a7012fLinux >= b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 < 22092730129077c302d8c947bbe0876f0280c528Linux >= b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 < ced3e18cd9b9caf630aaa1e1eac305f5192ba896Linux >= b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 < 6de17275b3ccdf9887568b07e54da2e3597217cfLinux >= b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 < 444216dacdbebd3e52d5e704facafbb230da09e9Linux >= b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 < 15d1f3c0dbe7a740f779337deb39f23cd8d002c8Linux >= b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 < 68d7cc5512238693670fc19c7a615df631e10edfLinux >= b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 < 71283aaa6c65b3cec84caf1dc78560985737641fLinux 4.20Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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