Bug 2155196 (CVE-2022-3606) - CVE-2022-3606 kernel: libbpf: NULL pointer dereference in find_prog_by_sec_insn
Summary: CVE-2022-3606 kernel: libbpf: NULL pointer dereference in find_prog_by_sec_insn
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2022-3606
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2155222 2155228 2155223 2155224 2155225 2155227 2155229 2155230
Blocks: 2136147
TreeView+ depends on / blocked
 
Reported: 2022-12-20 11:21 UTC by Mauro Matteo Cascella
Modified: 2023-11-16 08:33 UTC (History)
37 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in libbpf. When there are no program sections, obj->programs is left unallocated, causing a NULL pointer dereference in the following access to prog->sec_idx in find_prog_by_sec_insn. A local user could use this flaw to cause a denial of service.
Clone Of:
Environment:
Last Closed: 2023-01-07 18:00:39 UTC
Embargoed:

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Description Mauro Matteo Cascella 2022-12-20 11:21:36 UTC 
A NULL pointer dereference issue was found in libbpf. When there are no program sections, obj->programs is left unallocated, and find_prog_by_sec_insn()'s search lands on &obj->programs[0] == NULL, and will cause a NULL pointer dereference in the following access to prog->sec_idx.

Upstream patch & commit:
https://lore.kernel.org/bpf/20221012022353.7350-4-shung-hsi.yu@suse.com/
https://github.com/torvalds/linux/commit/d0d382f95a9270dcf803539d6781d6bd67e3f5b2
Comment 1 Mauro Matteo Cascella 2022-12-20 13:12:49 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2155222]


Created libbpf tracking bugs for this issue:

Affects: fedora-all [bug 2155228]
Comment 5 Product Security DevOps Team 2023-01-07 18:00:36 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2022-3606
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