CVE-2026-81002xdp: fix zero-copy frame layout
- 9.8CriticalCVSS base score
- 0.51%Exploitation in 30 daysEPSS · top 56% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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 ...
Timeline
ID reserved
By Linux
- 16 days later
· 16 days later
Published
- 38 days later
· 38 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.51% · top 56% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 – < dcb6db9ca6515fcd3e00c93ec5e27dc7a0a7012f
- affected b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 – < 22092730129077c302d8c947bbe0876f0280c528
- affected b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 – < ced3e18cd9b9caf630aaa1e1eac305f5192ba896
- affected b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 – < 6de17275b3ccdf9887568b07e54da2e3597217cf
- affected b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 – < 444216dacdbebd3e52d5e704facafbb230da09e9
- affected b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 – < 15d1f3c0dbe7a740f779337deb39f23cd8d002c8
- affected b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 – < 68d7cc5512238693670fc19c7a615df631e10edf
- affected b0d1beeff2a97a0cf1965ea8f1d13b8973f22582 – < 71283aaa6c65b3cec84caf1dc78560985737641f
- affected 4.20
- unaffected < 4.20
- unaffected 5.10.270 – ≤ 5.10.*
- unaffected 5.15.221 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.109 – ≤ 6.12.*
- unaffected 6.18.50 – ≤ 6.18.*
- unaffected 7.2.4 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/dcb6db9ca6515fcd3e00c93ec5e27dc7a0a7012f (opens in a new tab)
- https://git.kernel.org/stable/c/22092730129077c302d8c947bbe0876f0280c528 (opens in a new tab)
- https://git.kernel.org/stable/c/ced3e18cd9b9caf630aaa1e1eac305f5192ba896 (opens in a new tab)
- https://git.kernel.org/stable/c/6de17275b3ccdf9887568b07e54da2e3597217cf (opens in a new tab)
- https://git.kernel.org/stable/c/444216dacdbebd3e52d5e704facafbb230da09e9 (opens in a new tab)
- https://git.kernel.org/stable/c/15d1f3c0dbe7a740f779337deb39f23cd8d002c8 (opens in a new tab)
- https://git.kernel.org/stable/c/68d7cc5512238693670fc19c7a615df631e10edf (opens in a new tab)
- https://git.kernel.org/stable/c/71283aaa6c65b3cec84caf1dc78560985737641f (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-76325 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-81002)Record last updated .