Description
In the Linux kernel, the following vulnerability has been resolved: ipvlan: inherit needed_headroom and needed_tailroom from phy_dev ipvlan devices inherit hard_header_len from phy_dev during ipvlan_init(), but leave needed_headroom and needed_tailroom set to 0. When the underlying phy_dev (or stacked lower device) requires extra headroom or tailroom for headers/trailers (e.g. macsec, ipsec, wireguard, tunnels, or veth with rx headroom), upper layers calculating packet headroom and tailroom fail to reserve sufficient space. This can result in reallocation overhead, skb headroom underflows, or KASAN slab-use-after-free crashes when dev_hard_header() / ipvlan_hard_header() prepends header data or when lower devices append tailroom. Fix this by: 1. Inheriting needed_headroom and needed_tailroom from phy_dev in ipvlan_init(). 2. Propagating needed_headroom and needed_tailroom updates to attached ipvlans in ipvlan_device_event() when receiving NETDEV_FEAT_CHANGE events.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
2ad7bf3638411cb547f2823df08166c13ab04269 to < af602c4d0ee548da18e2409b4b4da1079625a372affected2ad7bf3638411cb547f2823df08166c13ab04269 to < f3c17ff65f54781cde696e16a6c577615ed735aaaffected2ad7bf3638411cb547f2823df08166c13ab04269 to < c0fbe31f6b20ade0465130685859faa5c86fda59affected2ad7bf3638411cb547f2823df08166c13ab04269 to < 5f33188457bbcc1b11ca87084037963c516ed3d9affected2ad7bf3638411cb547f2823df08166c13ab04269 to < 5c2ca77212eb38559b0353b8363b7a84f4b019ddaffected2ad7bf3638411cb547f2823df08166c13ab04269 to < e16e960d55a40d36bd7c2494cc005e757dc9a1efaffected
Linux Linux
Default version status: affected
3.19affected0 to < 3.19unaffected6.1.184 to ≤ 6.1.*unaffected6.6.153 to ≤ 6.6.*unaffected6.12.105 to ≤ 6.12.*unaffected6.18.46 to ≤ 6.18.*unaffected7.1.10 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/af602c4d0ee548da18e2409b4b4da1079625a372 ↗
- https://git.kernel.org/stable/c/f3c17ff65f54781cde696e16a6c577615ed735aa ↗
- https://git.kernel.org/stable/c/c0fbe31f6b20ade0465130685859faa5c86fda59 ↗
- https://git.kernel.org/stable/c/5f33188457bbcc1b11ca87084037963c516ed3d9 ↗
- https://git.kernel.org/stable/c/5c2ca77212eb38559b0353b8363b7a84f4b019dd ↗
- https://git.kernel.org/stable/c/e16e960d55a40d36bd7c2494cc005e757dc9a1ef ↗