nexthop: Initialize extack in remove_nh_grp_entry()
In the Linux kernel, the following vulnerability has been resolved: nexthop: Initialize extack in remove_nh_grp_entry() remove_nh_grp_entry() prints the extack message when a listener fails to replace the reduced nexthop group. However, extack is not initialized and listeners are not required to set a message when returning an error. Neither netdevsim nor mlxsw do so when an allocation fails, resulting in the dereference of an uninitialized stack pointer. Fix by zero-initializing extack, as was done in commit 6347c5314cee ("nexthop: initialize extack in nh_res_bucket_migrate()").
CVE-2026-98031
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-2026-98031
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": "833a1065eeb14437a9a0dfa9dad06ea09894e0b5",
"lessThan": "35d9ec61466109ef0c2de87067338d929f629527",
"versionType": "git"
},
{
"status": "affected",
"version": "833a1065eeb14437a9a0dfa9dad06ea09894e0b5",
"lessThan": "704319510af2179cf03955747d714ab291075c25",
"versionType": "git"
},
{
"status": "affected",
"version": "833a1065eeb14437a9a0dfa9dad06ea09894e0b5",
"lessThan": "17acbcd4c5a6ca3dd3f9e52eb203c9175bde609a",
"versionType": "git"
},
{
"status": "affected",
"version": "833a1065eeb14437a9a0dfa9dad06ea09894e0b5",
"lessThan": "030c878eaedf0449e2b5401a0a0146d0afcc645e",
"versionType": "git"
},
{
"status": "affected",
"version": "833a1065eeb14437a9a0dfa9dad06ea09894e0b5",
"lessThan": "d643cea4248668dc493c513aa7cbc6505eb1a4a9",
"versionType": "git"
},
{
"status": "affected",
"version": "833a1065eeb14437a9a0dfa9dad06ea09894e0b5",
"lessThan": "d80677ad7aa5bebfccfd58caa4852b65abe70561",
"versionType": "git"
},
{
"status": "affected",
"version": "833a1065eeb14437a9a0dfa9dad06ea09894e0b5",
"lessThan": "5bd9e4e7cdaa03879e9b73b12ab52cceb1edd55b",
"versionType": "git"
}
],
"programFiles": [
"net/ipv4/nexthop.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.11",
"versionType": "semver"
},
{
"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": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.7",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/ipv4/nexthop.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98031
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38156 · Revision 1
- Added to Heist Feed
- Publisher date