xfrm: esp: restore combined single-frag length gate
In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: restore combined single-frag length gate The ESP out-of-place fast path appends the trailer in esp_output_head() before esp_output_tail() allocates the destination page frag. The head-side gate currently checks skb->data_len and tailen separately, but the tail code allocates a single destination frag from the combined post-trailer skb->data_len. Reject the page-frag fast path when the combined aligned length exceeds a page. Otherwise skb_page_frag_refill() may fall back to a single page while the destination sg still spans the combined skb->data_len. Restore this combined-length page gate for both IPv4 and IPv6.
CVE-2026-63912
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-2026-63912
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": "c075c3ea031757f8ea2d34567565b61a868c08d5",
"lessThan": "566295735530ee513326049b0540f32ec050bf2e",
"versionType": "git"
},
{
"status": "affected",
"version": "a583f2f3c8788bffd7fd7baeb76bd6d80543d7ea",
"lessThan": "5d7ab86e2b6bc23054616bf6ac562013bf60af8c",
"versionType": "git"
},
{
"status": "affected",
"version": "5bd8baab087dff657e05387aee802e70304cc813",
"lessThan": "36519e3d941fc99d3b52c134dbaf311f987a4708",
"versionType": "git"
},
{
"status": "affected",
"version": "5bd8baab087dff657e05387aee802e70304cc813",
"lessThan": "322e48187e0245ab2fff6fec2220b0cae677dbec",
"versionType": "git"
},
{
"status": "affected",
"version": "5bd8baab087dff657e05387aee802e70304cc813",
"lessThan": "b84091ceddc9f133229dceab3ccc930bf27f9cba",
"versionType": "git"
},
{
"status": "affected",
"version": "5bd8baab087dff657e05387aee802e70304cc813",
"lessThan": "c093468aea8277f77272a4f199b2e15e19cabb59",
"versionType": "git"
},
{
"status": "affected",
"version": "5bd8baab087dff657e05387aee802e70304cc813",
"lessThan": "65f3b3fc2347b89fe21db1e92c7681368415f095",
"versionType": "git"
},
{
"status": "affected",
"version": "5bd8baab087dff657e05387aee802e70304cc813",
"lessThan": "dfa0d7b0ff1eb6b2c416b8fdb9b4f2cefba57a40",
"versionType": "git"
},
{
"status": "affected",
"version": "2c66b0c95bb0aa7652ba1eba293d0d5993b35a38",
"versionType": "git"
},
{
"status": "affected",
"version": "ef6f83df1209a7d9bd1c605a62457d4c00f9179e",
"versionType": "git"
},
{
"status": "affected",
"version": "3defefd22ad5fbbe639b6157fb7e6311b2bf333d",
"versionType": "git"
},
{
"status": "affected",
"version": "b657030870bb5351c5b1e84d4e9f186da6ca0496",
"versionType": "git"
},
{
"status": "affected",
"version": "5.10.113",
"lessThan": "5.10.259",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.36",
"lessThan": "5.15.210",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.14.288",
"lessThan": "4.15",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.19.252",
"lessThan": "4.20",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.4.205",
"lessThan": "5.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.17.5",
"lessThan": "5.18",
"versionType": "semver"
}
],
"programFiles": [
"net/ipv4/esp4.c",
"net/ipv6/esp6.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.18"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.18",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.259",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.210",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.176",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.143",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.93",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.35",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.12",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/ipv4/esp4.c",
"net/ipv6/esp6.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-63912
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #40887 · Revision 1
- Added to Heist Feed
- Publisher date