ipvlan: inherit needed_headroom and needed_tailroom from phy_dev
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.1.184, 6.6.153, 6.12.105, 6.18.46, 7.1.10
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: yes
- Technical impact: total
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: total
- Record last updated
Affected versions
- Linux Linux
From 2ad7bf3638411cb547f2823df08166c13ab04269 · fixed in af602c4d0ee548da18e2409b4b4da1079625a372; From 2ad7bf3638411cb547f2823df08166c13ab04269 · fixed in f3c17ff65f54781cde696e16a6c577615ed735aa; From 2ad7bf3638411cb547f2823df08166c13ab04269 · fixed in c0fbe31f6b20ade0465130685859faa5c86fda59; From 2ad7bf3638411cb547f2823df08166c13ab04269 · fixed in 5f33188457bbcc1b11ca87084037963c516ed3d9; From 2ad7bf3638411cb547f2823df08166c13ab04269 · fixed in 5c2ca77212eb38559b0353b8363b7a84f4b019dd; From 2ad7bf3638411cb547f2823df08166c13ab04269 · fixed in e16e960d55a40d36bd7c2494cc005e757dc9a1ef
- Linux Linux
3.19
- KernelLinux
From 3.19.0 · fixed in 6.1.184; From 6.2.0 · fixed in 6.6.153; From 6.7.0 · fixed in 6.12.105; From 6.13.0 · fixed in 6.18.46; From 6.19.0 · fixed in 7.1.10