high CVSS 7.8

CVE-2024-46804·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Add array index check for hdcp ddc access [Why] Coverity reports OVERRUN warning. Do not check if array index valid. [How] Check msg_id valid and valid array index.

Severity
high
Software
Kernel
Fixed in
6.10.9
Published
2024-09-27

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 a bounds-checking flaw in the AMD display driver's HDCP DDC message handling. This vulnerability allows local attackers with user privileges to trigger out-of-bounds memory access, potentially leading to privilege escalation or system crashes. Ensure your system receives the latest kernel updates through your distribution's package manager.

sudo dnf update kernel kernel-devel kernel-headers

Defensia detects this vulnerability

How to check if you are affected

  1. Check installed kernel version: uname -r — verify the version is 6.10.9 or later
  2. Confirm AMD GPU driver presence: lspci | grep -i amd — check if AMD display device is present on system
  3. Review kernel module loading: lsmod | grep amdgpu — verify the amdgpu or amd display module is active
  4. Verify patch application: grep -i hdcp /lib/modules/$(uname -r)/kernel/drivers/gpu/drm/amd/display/* — confirm bounds-checking code is present in compiled modules

FAQ

What is CVE-2024-46804?

CVE-2024-46804 is a kernel vulnerability in AMD's display driver that fails to validate array indices when accessing HDCP DDC (Display Data Channel) message structures, potentially allowing out-of-bounds memory reads or writes.

Is CVE-2024-46804 being actively exploited?

No, this vulnerability is not currently listed on CISA's Known Exploited Vulnerabilities (KEV) catalog and no public exploits are available.

What versions of Kernel are affected by CVE-2024-46804?

Linux kernel versions 6.7 through 6.10.8 are vulnerable; the issue is resolved in version 6.10.9 and later.

How do I check if my server is vulnerable to CVE-2024-46804?

Run `uname -r` to check your kernel version — if it is between 6.7 and 6.10.8 and you have an AMD GPU present (verified with `lspci | grep AMD`), your system is vulnerable.

Does Defensia detect CVE-2024-46804?

Yes — Defensia's CVE advisory scanner compares installed kernel package versions against the NVD database. If a vulnerable kernel version is installed on a monitored server, CVE-2024-46804 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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