CVE-2024-50142

CVE Details

Release Date:2024-11-07

Description


In the Linux kernel, the following vulnerability has been resolved: xfrm: validate new SA's prefixlen using SA family when sel.family is unset This expands the validation introduced in commit 07bf7908950a ('xfrm: Validate address prefix lengths in the xfrm selector.') syzbot created an SA with usersa.sel.family = AF_UNSPEC usersa.sel.prefixlen_s = 128 usersa.family = AF_INET Because of the AF_UNSPEC selector, verify_newsa_info doesn't put limits on prefixlen_{s,d}. But then copy_from_user_state sets x->sel.family to usersa.family (AF_INET). Do the same conversion in verify_newsa_info before validating prefixlen_{s,d}, since that's how prefixlen is going to be used later on.

See more information about CVE-2024-50142 from MITRE CVE dictionary and NIST NVD


NOTE: The following CVSS metrics and score provided are preliminary and subject to review.


CVSS v3 metrics

Base Score: 5.5
Vector String: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Version: 3.1
Attack Vector: Local
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

Errata information


PlatformErrataRelease Date
Oracle Linux version 7 (kernel-uek)ELSA-2024-128842024-12-16
Oracle Linux version 8 (kernel)ELSA-2024-109432024-12-11
Oracle Linux version 8 (kernel-uek)ELSA-2024-128842024-12-16
Oracle Linux version 8 (kernel-uek)ELSA-2024-128872024-12-18
Oracle Linux version 9 (kernel)ELSA-2024-114862025-01-06
Oracle Linux version 9 (kernel-uek)ELSA-2024-128872024-12-18


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