CVE-2024-43895: drm/amd/display: Skip Recompute DSC Params if no Stream on Link
In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: Skip Recompute DSC Params if no Stream on Link
[why] Encounter NULL pointer dereference uner mst + dsc setup.
BUG: kernel NULL pointer dereference, address: 0000000000000008 PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 4 PID: 917 Comm: sway Not tainted 6.3.9-arch1-1 #1 124dc55df4f5272ccb409f39ef4872fc2b3376a2 Hardware name: LENOVO 20NKS01Y00/20NKS01Y00, BIOS R12ET61W(1.31 ) 07/28/2022 RIP: 0010:drmdpatomicfindtimeslots+0x5e/0x260 [drmdisplayhelper] Code: 01 00 00 48 8b 85 60 05 00 00 48 63 80 88 00 00 00 3b 43 28 0f 8d 2e 01 00 00 48 8b 53 30 48 8d 04 80 48 8d 04 c2 48 8b 40 18 <48> 8> RSP: 0018:ffff960cc2df77d8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff8afb87e81280 RCX: 0000000000000224 RDX: ffff8afb9ee37c00 RSI: ffff8afb8da1a578 RDI: ffff8afb87e81280 RBP: ffff8afb83d67000 R08: 0000000000000001 R09: ffff8afb9652f850 R10: ffff960cc2df7908 R11: 0000000000000002 R12: 0000000000000000 R13: ffff8afb8d7688a0 R14: ffff8afb8da1a578 R15: 0000000000000224 FS: 00007f4dac35ce00(0000) GS:ffff8afe30b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000008 CR3: 000000010ddc6000 CR4: 00000000003506e0 Call Trace: <TASK> ? die+0x23/0x70 ? pagefaultoops+0x171/0x4e0 ? plistadd+0xbe/0x100 ? excpagefault+0x7c/0x180 ? asmexcpagefault+0x26/0x30 ? drmdpatomicfindtimeslots+0x5e/0x260 [drmdisplayhelper 0e67723696438d8e02b741593dd50d80b44c2026] ? drmdpatomicfindtimeslots+0x28/0x260 [drmdisplayhelper 0e67723696438d8e02b741593dd50d80b44c2026] computemstdscconfigsforlink+0x2ff/0xa40 [amdgpu 62e600d2a75e9158e1cd0a243bdc8e6da040c054] ? fillplanebufferattributes+0x419/0x510 [amdgpu 62e600d2a75e9158e1cd0a243bdc8e6da040c054] computemstdscconfigsforstate+0x1e1/0x250 [amdgpu 62e600d2a75e9158e1cd0a243bdc8e6da040c054] amdgpudmatomiccheck+0xecd/0x1190 [amdgpu 62e600d2a75e9158e1cd0a243bdc8e6da040c054] drmatomiccheckonly+0x5c5/0xa40 drmmodeatomicioctl+0x76e/0xbc0
[how] dsc recompute should be skipped if no mode change detected on the new request. If detected, keep checking whether the stream is already on current state or not.
(cherry picked from commit 8151a6c13111b465dbabe07c19f572f7cbd16fef)
Other sources
Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.
— NVD
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2024-43895?
CVE-2024-43895 has a severity level that can lead to a NULL pointer dereference, potentially causing system crashes.
How do I fix CVE-2024-43895?
To fix CVE-2024-43895, upgrade to the patched versions of the Linux kernel, specifically 6.1.123-1 or later available releases.
Which versions of Linux kernel are affected by CVE-2024-43895?
CVE-2024-43895 affects Linux kernel versions between 6.1.105 and 6.6.46, 6.7 and 6.10.5, and the release candidates 6.11-rc1 and 6.11-rc2.
Is CVE-2024-43895 specific to any Linux distributions?
Yes, CVE-2024-43895 is reported in the Linux kernel used by various distributions, including Debian and Ubuntu.
What kind of impact does CVE-2024-43895 have on system security?
CVE-2024-43895 can lead to system instability and potential denial of service due to a NULL pointer dereference.