high CVSS 7.5

CVE-2023-52883·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Fix possible null pointer dereference abo->tbo.resource may be NULL in amdgpu_vm_bo_update.

Severity
high
Software
Kernel
Fixed in
6.5.9
Published
2024-06-20

Affected versions

From: 6.4

Until: 6.5.9

Fixed in: 6.5.9

How to fix this CVE

Update your Linux kernel to version 6.5.9 or later to patch a null pointer dereference vulnerability in the AMD GPU driver's virtual memory management code. This issue could allow an attacker to trigger a denial of service condition. Apply the kernel update through your distribution's package manager and reboot your system to activate the patched version.

sudo dnf update kernel kernel-devel && sudo reboot

Defensia detects this vulnerability

How to check if you are affected

  1. Step 1: Check current kernel version with `uname -r` and compare against affected range (6.4 to 6.5.9)
  2. Step 2: Verify AMD GPU driver presence with `lspci | grep -i amd` and check if amdgpu module is loaded via `lsmod | grep amdgpu`
  3. Step 3: Search kernel logs for amdgpu-related NULL pointer dereference crashes using `sudo dmesg | grep -i 'null pointer\|amdgpu.*NULL\|amdgpu_vm_bo_update'`
  4. Step 4: After patching, verify the new kernel version with `uname -r` and confirm it is 6.5.9 or later

FAQ

What is CVE-2023-52883?

This vulnerability is a null pointer dereference in the AMD GPU (amdgpu) kernel driver's virtual memory buffer object update function. If a buffer object's resource pointer is not properly validated before use, it can cause a kernel panic or denial of service.

Is CVE-2023-52883 being actively exploited?

No, this vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog and no public exploits are currently available. However, it poses a high denial-of-service risk and should be patched promptly.

What versions of Kernel are affected by CVE-2023-52883?

Linux kernel versions 6.4 through 6.5.8 are vulnerable. The vulnerability is patched in kernel version 6.5.9 and later.

How do I check if my server is vulnerable to CVE-2023-52883?

Run `uname -r` to display your kernel version. If it shows a version between 6.4 and 6.5.8 (inclusive) and you have AMD GPU support enabled, your system is vulnerable. Cross-check with `cat /proc/version` for confirmation.

Does Defensia detect CVE-2023-52883?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If the Linux kernel is installed on a monitored server, CVE-2023-52883 will appear in your dashboard with remediation steps.

Related Kernel CVEs

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CVE-2024-36031CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: keys: Fix overwrite of key expiration on instantiation The expiry time of a key is unconditionally overwritten during instantiation, defaulting to turn it permanent. This causes a problem for DNS resolution as the expiration set by user-space is overwritten to TIME64_MAX, disabling further DNS updates. Fix this by restoring the condition that key_set_expiry is only called when the pre-parser sets a specific expiry.
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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