Bug 2250105 (CVE-2023-6111) - CVE-2023-6111 kernel: netfilter: use-after-free when removing catchall element in GC sync path
Summary: CVE-2023-6111 kernel: netfilter: use-after-free when removing catchall elemen...
Keywords:
Status: NEW
Alias: CVE-2023-6111
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2250106
Blocks: 2262207
TreeView+ depends on / blocked
 
Reported: 2023-11-16 16:37 UTC by Mauro Matteo Cascella
Modified: 2024-02-12 16:45 UTC (History)
45 users (show)

Fixed In Version: kernel 6.7-rc1
Doc Type: If docs needed, set a value
Doc Text:
A use-after-free flaw was found in the Linux kernel's netfilter functionality. This issue may allow a local user to crash the system or potentially escalate their privileges on the system.
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Environment:
Last Closed:
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Description Mauro Matteo Cascella 2023-11-16 16:37:56 UTC 
A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.

The function nft_trans_gc_catchall did not remove the catchall set element from the catchall_list when the argument sync is true, making it possible to free a catchall set element many times.

Upstream patch:
https://github.com/torvalds/linux/commit/93995bf4af2c5a99e2a87f0cd5ce547d31eb7630
Comment 1 Mauro Matteo Cascella 2023-11-16 16:38:25 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2250106]
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