ovpn: replace bind when clearing stale local source
In the Linux kernel, the following vulnerability has been resolved: ovpn: replace bind when clearing stale local source The UDP output fallback clears bind->local in place when the remembered source address is no longer usable. The bind is RCU-published and read locklessly by concurrent TX, so an IPv6 reader can observe a torn address. Retry the route lookup with source address autoselection without modifying the bind. After a successful lookup, revalidate the bind and route key under peer->lock, reset the dst cache, and best-effort publish a replacement bind with a wildcard local address. Do not cache the resolved dst when clearing the local source. Replacing the source invalidates all per-CPU cache entries, while dst_cache_set_ip4 and dst_cache_set_ip6 update only the current CPU slot. The current packet can still use the resolved route; if bind allocation fails, a later cache miss retries the repair.
CVE-2026-98603
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-2026-98603
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": "08857b5ec5d91d83e69e40a36554a8c7557b7301",
"lessThan": "c44a04722f7dae9a45a101b8e100931ab59f1c18",
"versionType": "git"
},
{
"status": "affected",
"version": "08857b5ec5d91d83e69e40a36554a8c7557b7301",
"lessThan": "72bd1bea37ea2c8553938f086bf48ccd2147dfe1",
"versionType": "git"
},
{
"status": "affected",
"version": "08857b5ec5d91d83e69e40a36554a8c7557b7301",
"lessThan": "7d8104988f423572df1f3347ce578037b1043f34",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/ovpn/udp.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.16"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.16",
"versionType": "semver"
},
{
"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": [
"drivers/net/ovpn/udp.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98603
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38622 · Revision 1
- Added to Heist Feed
- Publisher date