CVE-2026-74473vxlan: use pskb_network_may_pull() in route_shortcircuit()
- 9.8CriticalCVSS base score
- 0.53%Exploitation in 30 daysEPSS · top 55% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: vxlan: use pskb_network_may_pull() in route_shortcircuit() route_shortcircuit() currently calls pskb_may_pull(skb, sizeof(struct iphdr)) (or ipv6hdr), which checks if bytes are available starting from skb->data. However, in vxlan_xmit(), skb->data points to the MAC header, so skb_network_offset(skb) is ETH_HLEN (14 bytes). Using pskb_may_pull(skb, 20) only checks 20 bytes from skb->data (which is 14 bytes MAC header + 6 bytes of IP header), leaving the rest of the IP header potentially un-pulled in non-linear frags. Subsequent dereferences of ip_hdr(skb)->daddr can read beyond the pulled linear buffer length. Fix this by using pskb_network_may_pull(), which adds skb_network_offset(skb) to the length check to ensure the full network header is present in the linear buffer.
Timeline
ID reserved
By Linux
Published
- 2 months later
· 2 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.53% · top 55% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected e4f67addf158f98f8197e08974966b18480dc751 – < c419af4924c1593500a40519730ed98575d04a3e
- affected e4f67addf158f98f8197e08974966b18480dc751 – < 6bd0a3a1b5744166946f0c551a6665c3b46b05e4
- affected e4f67addf158f98f8197e08974966b18480dc751 – < 214ba43faf106cb06cd3dd30999c5c809c868b53
- affected e4f67addf158f98f8197e08974966b18480dc751 – < 42887be7c4cf283cce02cd0fb6411221167c8b6c
- affected e4f67addf158f98f8197e08974966b18480dc751 – < aa0d31376d574ac858a40078431a77127bf04ee4
- affected e4f67addf158f98f8197e08974966b18480dc751 – < ee799977d7941dbfb11049e17edd9eaf4f8820f7
- affected e4f67addf158f98f8197e08974966b18480dc751 – < 4f3f96e771a20263635bb5e1307c112d613b4bbd
- affected e4f67addf158f98f8197e08974966b18480dc751 – < 26bb2dd0a8839617e2c79ffbbe1923f8e4bab9fb
- affected 3.8
- unaffected < 3.8
- unaffected 5.10.265 – ≤ 5.10.*
- unaffected 5.15.216 – ≤ 5.15.*
- unaffected 6.1.183 – ≤ 6.1.*
- unaffected 6.6.151 – ≤ 6.6.*
- unaffected 6.12.103 – ≤ 6.12.*
- unaffected 6.18.44 – ≤ 6.18.*
- unaffected 7.1.8 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/c419af4924c1593500a40519730ed98575d04a3e (opens in a new tab)
- https://git.kernel.org/stable/c/6bd0a3a1b5744166946f0c551a6665c3b46b05e4 (opens in a new tab)
- https://git.kernel.org/stable/c/214ba43faf106cb06cd3dd30999c5c809c868b53 (opens in a new tab)
- https://git.kernel.org/stable/c/42887be7c4cf283cce02cd0fb6411221167c8b6c (opens in a new tab)
- https://git.kernel.org/stable/c/aa0d31376d574ac858a40078431a77127bf04ee4 (opens in a new tab)
- https://git.kernel.org/stable/c/ee799977d7941dbfb11049e17edd9eaf4f8820f7 (opens in a new tab)
- https://git.kernel.org/stable/c/4f3f96e771a20263635bb5e1307c112d613b4bbd (opens in a new tab)
- https://git.kernel.org/stable/c/26bb2dd0a8839617e2c79ffbbe1923f8e4bab9fb (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-59666 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-74473)Record last updated .