bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL
In the Linux kernel, the following vulnerability has been resolved: bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL An LWT_SEG6LOCAL program can invalidate its cached SRH with bpf_lwt_seg6_adjust_srh() and then call bpf_skb_pull_data(). The latter may reallocate skb->head, leaving the per-CPU SRH pointer dangling. Post-program SRH validation then writes through that pointer. Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL programs so the verifier rejects this unsafe helper combination. Other LWT program types continue to expose the helper through lwt_out_func_proto().
CVE-2026-98383
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-2026-98383
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": "004d4b274e2a1a895a0e5dc66158b90a7d463d44",
"lessThan": "0f38472a2aa8704a6b514c0dfa9c32f3672b8f32",
"versionType": "git"
},
{
"status": "affected",
"version": "004d4b274e2a1a895a0e5dc66158b90a7d463d44",
"lessThan": "cae8674489f26edf7553fdd660599466cbb4c32f",
"versionType": "git"
},
{
"status": "affected",
"version": "004d4b274e2a1a895a0e5dc66158b90a7d463d44",
"lessThan": "9f9e57b5a3a033f95f49ef9d541340cdbcb80abb",
"versionType": "git"
},
{
"status": "affected",
"version": "004d4b274e2a1a895a0e5dc66158b90a7d463d44",
"lessThan": "df0072be6fc373cb22f9ea854d458b04e32a03cf",
"versionType": "git"
},
{
"status": "affected",
"version": "004d4b274e2a1a895a0e5dc66158b90a7d463d44",
"lessThan": "b9bb0e735460751b620156f800a4279a28573392",
"versionType": "git"
},
{
"status": "affected",
"version": "004d4b274e2a1a895a0e5dc66158b90a7d463d44",
"lessThan": "37b18688cd18fd86d2f35c212df1611862a26cd5",
"versionType": "git"
},
{
"status": "affected",
"version": "004d4b274e2a1a895a0e5dc66158b90a7d463d44",
"lessThan": "fca71ead7a20290af1e2046983eeafae43d21af1",
"versionType": "git"
},
{
"status": "affected",
"version": "004d4b274e2a1a895a0e5dc66158b90a7d463d44",
"lessThan": "e4a62833adff6ef0fe7c0b90393204fe3c26b5c5",
"versionType": "git"
}
],
"programFiles": [
"net/core/filter.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.18"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.18",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.55",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.9",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/core/filter.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98383
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #55589 · Revision 1
- Added to Heist Feed
- Publisher date