CVSS v3
7.8
HIGH
Score EPSS
0.4 %
probabilité d’exploitation au 2026-09-28
CISA KEV
Non
exploitation connue
Exploitation
—
statut SSVC
Description
In the Linux kernel, the following vulnerability has been resolved: net: tun: bound receive headroom tun_get_user() uses tun->align both as skb headroom and when choosing how much packet data to keep linear. OVS can propagate an oversized headroom request from another port to TUN or TAP. When align is larger than the usable space in a one-page skb head, SKB_MAX_HEAD(align) underflows and the result becomes negative when stored in good_linear. That value later wraps when assigned to the size_t
Détails techniques
- Publiée le
- 2026-09-11
- Dernière modification
- 2026-09-13
Questions fréquentes
Qu’est-ce que CVE-2026-81000 ?
In the Linux kernel, the following vulnerability has been resolved: net: tun: bound receive headroom tun_get_user() uses tun->align both as skb headroom and when choosing how much packet data to keep linear. OVS can propagate an oversized headroom request from another port to TUN or TAP. When align is larger than the usable space in a one-page skb head, SKB_MAX_HEAD(align) underflows and the result becomes negative when stored in good_linear. That value later wraps when assigned to the size_t
CVE-2026-81000 est-elle activement exploitée ?
Aucune exploitation active de CVE-2026-81000 n’est confirmée. Son score EPSS était de 0.4 % au 2026-09-28, soit la probabilité estimée d’exploitation dans les 30 prochains jours.
Quel est le score CVSS de CVE-2026-81000 ?
CVE-2026-81000 a un score de base CVSS v3 de 7.8 (gravité HIGH).
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