high CVSS 7.8

CVE-2024-46871·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Correct the defined value for AMDGPU_DMUB_NOTIFICATION_MAX [Why & How] It actually exposes '6' types in enum dmub_notification_type. Not 5. Using smaller number to create array dmub_callback & dmub_thread_offload has potential to access item out of array bound. Fix it.

Severity
high
Software
Kernel
Fixed in
6.10.9
Published
2024-10-09

Affected versions

From: 6.7

Until: 6.10.9

Fixed in: 6.10.9

How to fix this CVE

Update your Linux kernel to version 6.10.9 or later to patch an array boundary condition in the AMD display driver's DMUB notification handler. This vulnerability allows local privileged attackers to trigger out-of-bounds memory access by exploiting an incorrect constant that defines the maximum number of notification types. Apply the patch immediately if you are running kernel versions 6.7 through 6.10.8.

sudo dnf update kernel kernel-devel

Defensia detects this vulnerability

How to check if you are affected

  1. Step 1: Check your kernel version with `uname -r` and verify it is 6.10.9 or later
  2. Step 2: Confirm AMD GPU drivers are in use by checking `lspci | grep -i amd` and `lsmod | grep amdgpu`
  3. Step 3: Search kernel logs for memory access violations with `sudo dmesg | grep -E '(general protection fault|segfault|amdgpu|dmub)' | tail -20`
  4. Step 4: Verify the patch was applied by checking `/proc/version` or running `cat /boot/config-$(uname -r) | grep CONFIG_DRM_AMD_DC`

FAQ

What is CVE-2024-46871?

CVE-2024-46871 is a kernel vulnerability in AMD's DMUB (Display Microcontroller Unit BIOS) notification handler where an incorrect constant underestimates the number of notification types, causing potential out-of-bounds array access when local privileged processes interact with the display driver.

Is CVE-2024-46871 being actively exploited?

No, CVE-2024-46871 is not listed on the CISA Known Exploited Vulnerabilities (KEV) catalog and no public exploits are currently available.

What versions of Kernel are affected by CVE-2024-46871?

Linux kernel versions 6.7 through 6.10.8 are affected. The vulnerability is patched in kernel 6.10.9 and later.

How do I check if my server is vulnerable to CVE-2024-46871?

Run `uname -r` to check your kernel version. If it shows 6.7.x through 6.10.8 and you have AMD GPU support enabled (`lsmod | grep amdgpu`), your system is vulnerable.

Does Defensia detect CVE-2024-46871?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If Kernel is installed on a monitored server, CVE-2024-46871 will appear in your dashboard with remediation steps.

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CVE-2024-38612CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: ipv6: sr: fix invalid unregister error path The error path of seg6_init() is wrong in case CONFIG_IPV6_SEG6_LWTUNNEL is not defined. In that case if seg6_hmac_init() fails, the genl_unregister_family() isn't called. This issue exist since commit 46738b1317e1 ("ipv6: sr: add option to control lwtunnel support"), and commit 5559cea2d5aa ("ipv6: sr: fix possible use-after-free and null-ptr-deref") replaced unregister_pernet_subsys() with genl_unregister_family() in this error path.
CVE-2024-38623CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Use variable length array instead of fixed size Should fix smatch warning: ntfs_set_label() error: __builtin_memcpy() 'uni->name' too small (20 vs 256)
CVE-2021-47548CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port() The if statement: if (port >= DSAF_GE_NUM) return; limits the value of port less than DSAF_GE_NUM (i.e., 8). However, if the value of port is 6 or 7, an array overflow could occur: port_rst_off = dsaf_dev->mac_cb[port]->port_rst_off; because the length of dsaf_dev->mac_cb is DSAF_MAX_PORT_NUM (i.e., 6). To fix this possible array overflow, we first check port and if it is greater than or equal to DSAF_MAX_PORT_NUM, the function returns.

References

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