CVE-2026-23001
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.19%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.19% probability · 9th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/15f6faf36e162532bec5cc05eb3fc622108bf2edPatch
- https://git.kernel.org/stable/c/232afc74a6dde0fe1830988e5827921f5ec9bb3fPatch
- https://git.kernel.org/stable/c/484919832e2db6ce1e8add92c469e5d459a516b5Patch
- https://git.kernel.org/stable/c/6dbead9c7677186f22b7981dd085a0feec1f038ePatch
- https://git.kernel.org/stable/c/7470a7a63dc162f07c26dbf960e41ee1e248d80ePatch
- https://git.kernel.org/stable/c/8133e85b8a3ec9f10d861e0002ec6037256e987ePatch
- https://git.kernel.org/stable/c/8518712a2ca952d6da2238c6f0a16b4ae5ea3f13Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.