xdp: fix zero-copy frame layout
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 ...
CVE-2026-81002
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-81002
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582",
"lessThan": "dcb6db9ca6515fcd3e00c93ec5e27dc7a0a7012f",
"versionType": "git"
},
{
"status": "affected",
"version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582",
"lessThan": "22092730129077c302d8c947bbe0876f0280c528",
"versionType": "git"
},
{
"status": "affected",
"version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582",
"lessThan": "ced3e18cd9b9caf630aaa1e1eac305f5192ba896",
"versionType": "git"
},
{
"status": "affected",
"version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582",
"lessThan": "6de17275b3ccdf9887568b07e54da2e3597217cf",
"versionType": "git"
},
{
"status": "affected",
"version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582",
"lessThan": "444216dacdbebd3e52d5e704facafbb230da09e9",
"versionType": "git"
},
{
"status": "affected",
"version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582",
"lessThan": "15d1f3c0dbe7a740f779337deb39f23cd8d002c8",
"versionType": "git"
},
{
"status": "affected",
"version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582",
"lessThan": "68d7cc5512238693670fc19c7a615df631e10edf",
"versionType": "git"
},
{
"status": "affected",
"version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582",
"lessThan": "71283aaa6c65b3cec84caf1dc78560985737641f",
"versionType": "git"
}
],
"programFiles": [
"net/core/xdp.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.20"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.20",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/core/xdp.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-81002
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #34958 · Revision 1
- Added to Heist Feed
- Publisher date