netfilter: bpf: reject invalid NAT manipulation types
In the Linux kernel, the following vulnerability has been resolved: netfilter: bpf: reject invalid NAT manipulation types As bpf_ct_set_nat_info() is not validating the NAT manipulation type a wrong value can be passed directly to nf_nat_setup_info(). This triggers the WARN_ON() at nf_nat_setup_info() and if panic_on_warn isn't set, then IPS_SRC_NAT_DONE is set without adding nat_bysource and conntrack cleanup tries to unlink an uninitialized hlist node. Fix this by checking that NAT manipulation type is correct before calling nf_nat_setup_info(). In addition, if the WARN_ON is hit, return NF_DROP instead of continuing with the processing to avoid similar situations in the future.
CVE-2026-98793
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-2026-98793
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": "0fabd2aa199faeb8754aee94658f2c48ccb2c8c3",
"lessThan": "752492947be3123ea6c689e2f93ae04ecd675d42",
"versionType": "git"
},
{
"status": "affected",
"version": "0fabd2aa199faeb8754aee94658f2c48ccb2c8c3",
"lessThan": "ea777dc90ab37e64fa4b92f6fcf3b5edcef5e058",
"versionType": "git"
},
{
"status": "affected",
"version": "0fabd2aa199faeb8754aee94658f2c48ccb2c8c3",
"lessThan": "f6143ae109df56d51d5536e813deb19eee7a6205",
"versionType": "git"
},
{
"status": "affected",
"version": "0fabd2aa199faeb8754aee94658f2c48ccb2c8c3",
"lessThan": "58108f05b0502448f6bb612ee2eccc63bd6449cb",
"versionType": "git"
},
{
"status": "affected",
"version": "0fabd2aa199faeb8754aee94658f2c48ccb2c8c3",
"lessThan": "16d464013ec2267b00a83f4bfbb97b3ecc63bfa7",
"versionType": "git"
}
],
"programFiles": [
"net/netfilter/nf_nat_bpf.c",
"net/netfilter/nf_nat_core.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.56",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.10",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/netfilter/nf_nat_bpf.c",
"net/netfilter/nf_nat_core.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98793
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48980 · Revision 1
- Added to Heist Feed
- Publisher date