ipv6: add NULL checks for idev in SRv6 paths
In the Linux kernel, the following vulnerability has been resolved: ipv6: add NULL checks for idev in SRv6 paths __in6_dev_get() can return NULL when the device has no IPv6 configuration (e.g. MTU < IPV6_MIN_MTU or after NETDEV_UNREGISTER). Add NULL checks for idev returned by __in6_dev_get() in both seg6_hmac_validate_skb() and ipv6_srh_rcv() to prevent potential NULL pointer dereferences.
CVE-2026-23442
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-2026-23442
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": "1ababeba4a21f3dba3da3523c670b207fb2feb62",
"lessThan": "0348fa0ada37cef7c6b5ab2a428bb2c6aee784e4",
"versionType": "git"
},
{
"status": "affected",
"version": "1ababeba4a21f3dba3da3523c670b207fb2feb62",
"lessThan": "83d705d35e583cb1b1eacf196dfe7b77d442018e",
"versionType": "git"
},
{
"status": "affected",
"version": "1ababeba4a21f3dba3da3523c670b207fb2feb62",
"lessThan": "d1bd8b9edc6752d10f84d28ff64f842401ce336d",
"versionType": "git"
},
{
"status": "affected",
"version": "1ababeba4a21f3dba3da3523c670b207fb2feb62",
"lessThan": "50352fc103928e10e8729abc79a0d05abef26c4d",
"versionType": "git"
},
{
"status": "affected",
"version": "1ababeba4a21f3dba3da3523c670b207fb2feb62",
"lessThan": "bc9843c39f9932a8b36efd1d362ea00bb88e4e78",
"versionType": "git"
},
{
"status": "affected",
"version": "1ababeba4a21f3dba3da3523c670b207fb2feb62",
"lessThan": "c5cedee5d97382176573bbe21e1724e737a5eb64",
"versionType": "git"
},
{
"status": "affected",
"version": "1ababeba4a21f3dba3da3523c670b207fb2feb62",
"lessThan": "a25853c9feea7bbf31d157ff6e004d2d3b4f7f13",
"versionType": "git"
},
{
"status": "affected",
"version": "1ababeba4a21f3dba3da3523c670b207fb2feb62",
"lessThan": "06413793526251870e20402c39930804f14d59c0",
"versionType": "git"
}
],
"programFiles": [
"net/ipv6/exthdrs.c",
"net/ipv6/seg6_hmac.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.258",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.209",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.136",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.83",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.25",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.10",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/ipv6/exthdrs.c",
"net/ipv6/seg6_hmac.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-23442
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #27254 · Revision 1
- Added to Heist Feed
- Publisher date