Bug 2281773 (CVE-2024-35863) - CVE-2024-35863 kernel: smb: client: fix potential UAF in is_valid_oplock_break()
Summary: CVE-2024-35863 kernel: smb: client: fix potential UAF in is_valid_oplock_break()
Keywords:
Status: NEW
Alias: CVE-2024-35863
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2281774
Blocks: 2281792
TreeView+ depends on / blocked
 
Reported: 2024-05-20 13:38 UTC by ybuenos
Modified: 2024-06-20 13:43 UTC (History)
49 users (show)

Fixed In Version: kernel 6.1.85, kernel 6.6.26, kernel 6.8.5, kernel 6.9
Doc Type: If docs needed, set a value
Doc Text:
A use-after-free flaw was found in the Linux kernel in smb is_valid_oplock_break() when exiting a session. This flaw allows a local attacker to crash the system.
Clone Of:
Environment:
Last Closed:
Embargoed:


Attachments (Terms of Use)

Description ybuenos 2024-05-20 13:38:05 UTC
In the Linux kernel, the following vulnerability has been resolved:

smb: client: fix potential UAF in is_valid_oplock_break()

The Linux kernel CVE team has assigned CVE-2024-35863 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024051938-CVE-2024-35863-7c05@gregkh/T

Comment 2 ybuenos 2024-05-20 13:38:54 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2281774]

Comment 4 Alex 2024-06-09 17:12:20 UTC
The result of automatic check (that is developed by Alexander Larkin) for this CVE-2024-35863 is: CHECK	Maybe valid. Check manually. with impact LOW (that is an approximation based on flags DISK INIT SIMPLEFIX UAF SERVERTOCLIENT  ; these flags parsed automatically based on patch data). Such automatic check happens only for Low/Moderates (and only when not from reporter, but parsing already existing CVE). Highs always checked manually (I check it myself and then we check it again in Remediation team). In rare cases some of the Moderates could be increased to High later.


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