CVE-2022-48770
In the Linux kernel, the following vulnerability has been resolved: bpf: Guard against accessing NULL pt_regs in bpf_get_task_stack() task_pt_regs() can return NULL on powerpc for kernel threads.
Does this matter?
Lower severity and a low EPSS score (0.22%). Track it; it rarely justifies an emergency change on its own.
Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Guard against accessing NULL pt_regs in bpf_get_task_stack() task_pt_regs() can return NULL on powerpc for kernel threads. This is then used in __bpf_get_stack() to check for user mode, resulting in a kernel oops. Guard against this by checking return value of task_pt_regs() before trying to obtain the call chain.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.22% probability · 12th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0bcd484587b3b3092e448d27dc369e347e1810c3Patch
- https://git.kernel.org/stable/c/b82ef4985a6d05e80f604624332430351df7b79aPatch
- https://git.kernel.org/stable/c/b992f01e66150fc5e90be4a96f5eb8e634c8249ePatch
- https://git.kernel.org/stable/c/ff6bdc205fd0a83bd365405d4e31fb5905826996Patch
- https://git.kernel.org/stable/c/0bcd484587b3b3092e448d27dc369e347e1810c3Patch
- https://git.kernel.org/stable/c/b82ef4985a6d05e80f604624332430351df7b79aPatch
- https://git.kernel.org/stable/c/b992f01e66150fc5e90be4a96f5eb8e634c8249ePatch
- https://git.kernel.org/stable/c/ff6bdc205fd0a83bd365405d4e31fb5905826996Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.