CVE-2026-23001
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved:
macvlan: fix possible UAF in macvlan_forward_source()
Add RCU protection on (struct macvlan_source_entry)->vlan.
Whenever macvlan_hash_del_source() is called, we must clear entry->vlan pointer before RCU grace period starts.
This allows macvlan_forward_source() to skip over entries queued for freeing.
Note that macvlan_dev are already RCU protected, as they are embedded in a standard netdev (netdev_priv(ndev)).
https: //lore.kernel.org/netdev/695fb1e8.050a0220.1c677c.039f.GAE@google.com/T/#u
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 79cf79abce71eb7dbc40e2f3121048ca5405cb47 < 8133e85b8a3ec9f10d861e0002ec6037256e987e | affected |
| Linux | Linux | 79cf79abce71eb7dbc40e2f3121048ca5405cb47 < 484919832e2db6ce1e8add92c469e5d459a516b5 | affected |
| Linux | Linux | 79cf79abce71eb7dbc40e2f3121048ca5405cb47 < 232afc74a6dde0fe1830988e5827921f5ec9bb3f | affected |
| Linux | Linux | 79cf79abce71eb7dbc40e2f3121048ca5405cb47 < 15f6faf36e162532bec5cc05eb3fc622108bf2ed | affected |
| Linux | Linux | 79cf79abce71eb7dbc40e2f3121048ca5405cb47 < 8518712a2ca952d6da2238c6f0a16b4ae5ea3f13 | affected |
| Linux | Linux | 79cf79abce71eb7dbc40e2f3121048ca5405cb47 < 6dbead9c7677186f22b7981dd085a0feec1f038e | affected |
| Linux | Linux | 79cf79abce71eb7dbc40e2f3121048ca5405cb47 < 7470a7a63dc162f07c26dbf960e41ee1e248d80e | affected |
| Linux | Linux | 3.18 | affected |
| Linux | Linux | 0 < 3.18 | unaffected |
| Linux | Linux | 5.10.249 <= 5.10.* | unaffected |
| Linux | Linux | 5.15.199 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.162 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.122 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.67 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.7 <= 6.18.* | unaffected |
| Linux | Linux | 6.19 <= * | unaffected |
Weaknesses
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: total
References
- https://git.kernel.org/stable/c/8133e85b8a3ec9f10d861e0002ec6037256e987e
- https://git.kernel.org/stable/c/484919832e2db6ce1e8add92c469e5d459a516b5
- https://git.kernel.org/stable/c/232afc74a6dde0fe1830988e5827921f5ec9bb3f
- https://git.kernel.org/stable/c/15f6faf36e162532bec5cc05eb3fc622108bf2ed
- https://git.kernel.org/stable/c/8518712a2ca952d6da2238c6f0a16b4ae5ea3f13
- https://git.kernel.org/stable/c/6dbead9c7677186f22b7981dd085a0feec1f038e
- https://git.kernel.org/stable/c/7470a7a63dc162f07c26dbf960e41ee1e248d80e
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