Описание
In the Linux kernel, the following vulnerability has been resolved:
ndisc: extend RCU protection in ndisc_send_skb()
ndisc_send_skb() can be called without RTNL or RCU held.
Acquire rcu_read_lock() earlier, so that we can use dev_net_rcu()
and avoid a potential UAF.
A flaw was found in the Linux kernel. The ndisc_send_skb() function, responsible for handling Neighbor Discovery (ND) messages in IPv6, can be called without proper Read-Copy-Update (RCU) protection. This missing protection can lead to a Use-After-Free (UAF) vulnerability. A Use-After-Free vulnerability occurs when a program attempts to use memory after it has been freed, which can lead to system instability or potentially arbitrary code execution.
Отчет
This vulnerability is rated as having a Moderate impact because triggering the race condition requires local network namespace or interface operations with authenticated user access, primarily resulting in a kernel crash (denial of service). Although IPv6 neighbor discovery is active by default across standard Red Hat Enterprise Linux installations, exploiting this use-after-free condition to achieve arbitrary code execution or privilege escalation is complex and improbable in typical deployment environments. Consequently, the flaw poses an availability risk to the host system rather than broad system compromise.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 10 | kernel | Will not fix | ||
| Red Hat Enterprise Linux 6 | kernel | Out of support scope | ||
| Red Hat Enterprise Linux 7 | kernel | Fix deferred | ||
| Red Hat Enterprise Linux 7 | kernel-rt | Fix deferred | ||
| Red Hat Enterprise Linux 8 | kernel | Affected | ||
| Red Hat Enterprise Linux 8 | kernel-rt | Affected | ||
| Red Hat Enterprise Linux 9 | kernel | Will not fix |
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Дополнительная информация
Статус:
EPSS
5.5 Medium
CVSS3
Связанные уязвимости
In the Linux kernel, the following vulnerability has been resolved: ndisc: extend RCU protection in ndisc_send_skb() ndisc_send_skb() can be called without RTNL or RCU held. Acquire rcu_read_lock() earlier, so that we can use dev_net_rcu() and avoid a potential UAF.
In the Linux kernel, the following vulnerability has been resolved: ndisc: extend RCU protection in ndisc_send_skb() ndisc_send_skb() can be called without RTNL or RCU held. Acquire rcu_read_lock() earlier, so that we can use dev_net_rcu() and avoid a potential UAF.
In the Linux kernel, the following vulnerability has been resolved: n ...
In the Linux kernel, the following vulnerability has been resolved: ndisc: extend RCU protection in ndisc_send_skb() ndisc_send_skb() can be called without RTNL or RCU held. Acquire rcu_read_lock() earlier, so that we can use dev_net_rcu() and avoid a potential UAF.
EPSS
5.5 Medium
CVSS3