CVE-2022-0995Escalamiento de privilegios en el kernel de Linux
Linux Kernel contains an out-of-bounds memory write vulnerability which could allow a local user to gain privileged access or cause a denial of service on the system.
Ver en NVDAnálisis
Una vulnerabilidad de escritura de memoria fuera de límites en el subsistema watch_queue del kernel de Linux permite a un usuario local obtener privilegios de root o causar una denegación de servicio. Este fallo está siendo explotado activamente en ataques reales. Es fundamental parchar servidores y entornos basados en Linux de inmediato.
Roles relevantes
Severidad
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCWE-787CISA KEV
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
EPSS
Afecta
linux:linux_kernelfedoraproject:fedoranetapp:h300e_firmwarenetapp:h300enetapp:h300s_firmwarenetapp:h300snetapp:h410c_firmwarenetapp:h410cnetapp:h410s_firmwarenetapp:h410snetapp:h500e_firmwarenetapp:h500enetapp:h500s_firmwarenetapp:h500snetapp:h610c_firmwarenetapp:h610cnetapp:h610s_firmwarenetapp:h610snetapp:h615c_firmwarenetapp:h615cnetapp:h700e_firmwarenetapp:h700enetapp:h700s_firmwarenetapp:h700sDescripción técnica
An out-of-bounds (OOB) memory write flaw was found in the Linux kernel’s watch_queue event notification subsystem. This flaw can overwrite parts of the kernel state, potentially allowing a local user to gain privileged access or cause a denial of service on the system.
Referencias
- http://packetstormsecurity.com/files/166770/Linux-watch_queue-Filter-Out-Of-Bounds-Write.html
- http://packetstormsecurity.com/files/166815/Watch-Queue-Out-Of-Bounds-Write.html
- https://bugzilla.redhat.com/show_bug.cgi?id=2063786
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=93ce93587d36493f2f86921fa79921b3cba63fbb
- https://security.netapp.com/advisory/ntap-20220429-0001/
- http://packetstormsecurity.com/files/166770/Linux-watch_queue-Filter-Out-Of-Bounds-Write.html
- http://packetstormsecurity.com/files/166815/Watch-Queue-Out-Of-Bounds-Write.html
- https://bugzilla.redhat.com/show_bug.cgi?id=2063786