Bug 1226631 (CVE-2024-38577)

Summary: VUL-0: CVE-2024-38577: kernel: rcu-tasks: fix show_rcu_tasks_trace_gp_kthread buffer overflow
Product: [Novell Products] SUSE Security Incidents Reporter: SMASH SMASH <smash_bz>
Component: IncidentsAssignee: Frederic Weisbecker <fweisbecker>
Status: NEW --- QA Contact: Security Team bot <security-team>
Severity: Normal    
Priority: P3 - Medium CC: camila.matos, mhocko
Version: unspecified   
Target Milestone: ---   
Hardware: Other   
OS: Other   
URL: https://smash.suse.de/issue/411384/
Whiteboard: CVSSv3.1:SUSE:CVE-2024-38577:6.4:(AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H)
Found By: Security Response Team Services Priority:
Business Priority: Blocker: ---
Marketing QA Status: --- IT Deployment: ---

Description SMASH SMASH 2024-06-20 13:58:45 UTC 
In the Linux kernel, the following vulnerability has been resolved:

rcu-tasks: Fix show_rcu_tasks_trace_gp_kthread buffer overflow

There is a possibility of buffer overflow in
show_rcu_tasks_trace_gp_kthread() if counters, passed
to sprintf() are huge. Counter numbers, needed for this
are unrealistically high, but buffer overflow is still
possible.

Use snprintf() with buffer size instead of sprintf().

Found by Linux Verification Center (linuxtesting.org) with SVACE.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-38577
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-38577.mbox
https://git.kernel.org/stable/c/08186d0c5fb64a1cc4b43e009314ee6b173ed222
https://git.kernel.org/stable/c/32d988f48ed287e676a29a15ac30701c35849aec
https://git.kernel.org/stable/c/6593d857ce5b5b802fb73d8091ac9c84b92c1697
https://git.kernel.org/stable/c/1a240e138071b25944ded0f5b3e357aa99fabcb7
https://git.kernel.org/stable/c/cc5645fddb0ce28492b15520306d092730dffa48
https://www.cve.org/CVERecord?id=CVE-2024-38577