high CVSS 7.8

CVE-2024-27045·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix a potential buffer overflow in 'dp_dsc_clock_en_read()' Tell snprintf() to store at most 10 bytes in the output buffer instead of 30. Fixes the below: drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_debugfs.c:1508 dp_dsc_clock_en_read() error: snprintf() is printing too much 30 vs 10

Severity
high
Software
Kernel
Fixed in
6.8.2
Published
2024-05-01

Affected versions

From: 6.8

Until: 6.8.2

Fixed in: 6.8.2

How to fix this CVE

Update your Linux kernel to version 6.8.2 or later to address a buffer overflow vulnerability in the AMD display driver's debugfs interface. This fix corrects improper buffer size validation in the dp_dsc_clock_en_read() function that could allow local privilege escalation. Apply the security update through your distribution's package manager immediately.

sudo dnf update kernel kernel-headers kernel-devel

Defensia detects this vulnerability

How to check if you are affected

  1. Run 'uname -r' to check your current kernel version; versions 6.8.0 through 6.8.2 are vulnerable
  2. Check if AMD GPU drivers are loaded with 'lspci | grep -i amd' and 'lsmod | grep amdgpu' to confirm the vulnerable component is active
  3. Review kernel logs for debugfs access attempts targeting display driver parameters: 'sudo grep -i "dp_dsc\|debugfs" /var/log/kern.log | tail -100'
  4. Verify the fix by running 'uname -r' after patching and confirming the version is 6.8.2 or higher

FAQ

What is CVE-2024-27045?

CVE-2024-27045 is a buffer overflow vulnerability in the Linux kernel's AMD display driver debugfs interface. A local attacker with low privileges could write beyond allocated buffer boundaries through the dp_dsc_clock_en_read() function, potentially achieving privilege escalation or code execution.

Is CVE-2024-27045 being actively exploited?

No, CVE-2024-27045 is not listed on the CISA Known Exploited Vulnerabilities (KEV) catalog and no public exploits are currently available. However, the high CVSS score (7.8) warrants prompt patching.

What versions of Kernel are affected by CVE-2024-27045?

Linux kernel versions 6.8.0, 6.8.1, and 6.8.2 (before patch) are vulnerable. The fix is included in kernel version 6.8.2 and all subsequent releases.

How do I check if my server is vulnerable to CVE-2024-27045?

Run 'uname -r' and if the output shows 6.8.0, 6.8.1, or early 6.8.2, your system is vulnerable. Then verify AMD GPU presence with 'lspci | grep -i amd' and 'lsmod | grep amdgpu'—if both are present, the vulnerability is exploitable.

Does Defensia detect CVE-2024-27045?

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-2024-27045 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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