CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: validate body pcifunc in rvu_mbox_handler_rep_event_notify rvu_mbox_handler_rep_event_notify() in drivers/net/ethernet/marvell/ octeontx2/af/rvu_rep.c queues a sender-controlled REP_EVENT_NOTIFY request body verbatim, and rvu_rep_up_notify() then forwards event->pcifunc (the nested body field, distinct from the AF-normalised header pcifunc) into rvu_get_pfvf(), rvu_get_pf() and the AF->PF mailbox device index without any bounds check. A VF attached to a PF that has been put into switchdev representor mode reaches this path: the VF mailbox handler otx2_pfvf_mbox_handler() forwards every message id including MBOX_MSG_REP_EVENT_NOTIFY to AF without an allowlist, and the AF dispatcher rewrites only msg->pcifunc, leaving struct rep_event::pcifunc attacker-controlled. The sibling rvu_mbox_handler_esw_cfg() refuses requests whose header pcifunc is not rvu->rep_pcifunc; this handler has no equivalent gate. An out-of-range body pcifunc selects an &rvu->pf[]/&rvu->hwvf[] element past the allocated array and, for RVU_EVENT_MAC_ADDR_CHANGE, turns into a six-byte attacker-chosen OOB ether_addr_copy() target inside the queued worker; KASAN reports a slab-out-of-bounds write in rvu_rep_wq_handler. Reject malformed requests at the handler entry by gating on is_pf_func_valid(), which is already the canonical PF/VF range check in this driver; expose it via rvu.h so callers in rvu_rep.c can use it instead of open-coding the same range arithmetic.
Засегнати продукти
- Linux Linux: b8fea84a0468404fe3b3327ad54d583950be9dec преди 4467fa514482bbce82f73788943c815f3d126ab3; b8fea84a0468404fe3b3327ad54d583950be9dec преди 68be0260e2a02ff9b18a8678d5f8d1715fa20138; b8fea84a0468404fe3b3327ad54d583950be9dec преди 2156a29aecfffa2eb7c558255690084efbe9f3b0
- Linux Linux: 6.13; преди 6.13; 6.18.42 до 6.18.*; 7.0.12 до 7.0.*; от 7.1 нататък
Вид слабост
История
- 19 юли 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-63923
- https://nvd.nist.gov/vuln/detail/CVE-2026-63923
- https://git.kernel.org/stable/c/4467fa514482bbce82f73788943c815f3d126ab3
- https://git.kernel.org/stable/c/68be0260e2a02ff9b18a8678d5f8d1715fa20138
- https://git.kernel.org/stable/c/2156a29aecfffa2eb7c558255690084efbe9f3b0