Bug 2348027 (CVE-2022-49162) - CVE-2022-49162 kernel: video: fbdev: sm712fb: Fix crash in smtcfb_write()
Summary: CVE-2022-49162 kernel: video: fbdev: sm712fb: Fix crash in smtcfb_write()
Keywords:
Status: NEW
Alias: CVE-2022-49162
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-02-26 03:15 UTC by OSIDB Bzimport
Modified: 2025-11-25 10:02 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2025-02-26 03:15:08 UTC 
In the Linux kernel, the following vulnerability has been resolved:

video: fbdev: sm712fb: Fix crash in smtcfb_write()

When the sm712fb driver writes three bytes to the framebuffer, the
driver will crash:

    BUG: unable to handle page fault for address: ffffc90001ffffff
    RIP: 0010:smtcfb_write+0x454/0x5b0
    Call Trace:
     vfs_write+0x291/0xd60
     ? do_sys_openat2+0x27d/0x350
     ? __fget_light+0x54/0x340
     ksys_write+0xce/0x190
     do_syscall_64+0x43/0x90
     entry_SYSCALL_64_after_hwframe+0x44/0xae

Fix it by removing the open-coded endianness fixup-code.
Comment 1 Avinash Hanwate 2025-02-27 07:57:47 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022611-CVE-2022-49162-654f@gregkh/T
Comment 2 Avinash Hanwate 2025-02-27 21:22:04 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022611-CVE-2022-49162-654f@gregkh/T
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