CVE-2026-72421
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
ipv4: fib: Don't ignore error route in local/main tables.
In the Linux kernel, the following vulnerability has been resolved: ipv4: fib: Don't ignore error route in local/main tables. When CONFIG_IP_MULTIPLE_TABLES is enabled but no rule is added, fib_lookup() performs route lookup directly on two tables. Since the first lookup does not properly bail out, the result of an error route in the merged local/main table could be overwritten by another route in the default table: # unshare -n # ip link set lo up # ip route add 192.168.0.0/24 dev lo table 253 # ip route add unreachable 192.168.0.0/24 # ip route get 192.168.0.1 192.168.0.1 dev lo table default uid 0 cache <local> Once a random rule is added, the error route is respected: # ip rule add table 0 # ip rule del table 0 # ip route get 192.168.0.1 RTNETLINK answers: No route to host Let's fix the inconsistent behaviour.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| f4530fa574df4d833506c53697ed1daa0d390bf4 | affected | git | a29e95fbc51e8a1b932773fd0e259b2080881443 | Unavailable | None listed |
| f4530fa574df4d833506c53697ed1daa0d390bf4 | affected | git | 5ae18d87a45698e8244d0fcba64c658c35a7dd3d | Unavailable | None listed |
| f4530fa574df4d833506c53697ed1daa0d390bf4 | affected | git | 9127589aabdee588278e8d0d0bd3709a760a92c8 | Unavailable | None listed |
| f4530fa574df4d833506c53697ed1daa0d390bf4 | affected | git | 49eaf1403201357762d745a35882fb734107d763 | Unavailable | None listed |
| f4530fa574df4d833506c53697ed1daa0d390bf4 | affected | git | fd25996f57a95d56bc568c89b4921edcf334b7d8 | Unavailable | None listed |
| f4530fa574df4d833506c53697ed1daa0d390bf4 | affected | git | 828fad4fd418bcdb9f5d66fec0d184c52a85ec31 | Unavailable | None listed |
| f4530fa574df4d833506c53697ed1daa0d390bf4 | affected | git | a668fa160247d7bbe921548cb845f607b8b9305f | Unavailable | None listed |
| f4530fa574df4d833506c53697ed1daa0d390bf4 | affected | git | b72f0db64205d9ce462038ba995d5d31eff32dc1 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 3.6 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 3.6 | Unavailable | None listed |
| 5.10.261 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.212 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.178 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.145 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.97 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.40 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.5 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |