CVE-2022-49548
bpf: Fix potential array overflow in bpf_trampoline_get_progs()
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Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix potential array overflow in bpf_trampoline_get_progs() The cnt value in the 'cnt >= BPF_MAX_TRAMP_PROGS' check does not include BPF_TRAMP_MODIFY_RETURN bpf programs, so the number of the attached BPF_TRAMP_MODIFY_RETURN bpf programs in a trampoline can exceed BPF_MAX_TRAMP_PROGS. When this happens, the assignment '*progs++ = aux->prog' in bpf_trampoline_get_progs() will cause progs array overflow as the progs field in the bpf_tramp_progs struct can only hold at most BPF_MAX_TRAMP_PROGS bpf programs.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/32c4559c61652f24c9fdd5440342196fe37453bc
- https://git.kernel.org/stable/c/4f8897bcc20b9ae44758e0572538d741ab66f0dc
- https://git.kernel.org/stable/c/7f845de2863334bed4f362e95853f5e7bc323737
- https://git.kernel.org/stable/c/a2aa95b71c9bbec793b5c5fa50f0a80d882b3e8d
- https://git.kernel.org/stable/c/e36452d5da6325df7c10cffc60a9e68d21e2606d
References (5)
SSVC — Action Prioritization
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
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