high CVSS 7.8

CVE-2022-49645·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: drm/panfrost: Fix shrinker list corruption by madvise IOCTL Calling madvise IOCTL twice on BO causes memory shrinker list corruption and crashes kernel because BO is already on the list and it's added to the list again, while BO should be removed from the list before it's re-added. Fix it.

Severity
high
Software
Kernel
Fixed in
5.18.13
Published
2025-02-26

Affected versions

From: 5.16

Until: 5.18.13

Fixed in: 5.18.13

How to fix this CVE

Update your Linux kernel to version 5.18.13 or later to resolve a critical memory management flaw in the DRM Panfrost driver. This vulnerability allows repeated madvise IOCTL calls to corrupt the kernel's memory shrinker list, leading to system crashes. Administrators should prioritize this update, especially on systems running kernels 5.16 through 5.18.12.

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 confirm it falls within 5.16.x to 5.18.12
  2. Step 2: Verify if GPU-accelerated graphics via Panfrost driver is active by checking `lspci | grep -i vga` and `dmesg | grep -i panfrost`
  3. Step 3: Search kernel logs for memory shrinker list corruption symptoms using `dmesg | grep -i 'list_add double add\|shrinker\|memory corruption'`
  4. Step 4: After applying the patch, confirm the new kernel version with `uname -r` and verify no shrinker warnings appear in fresh dmesg output

FAQ

What is CVE-2022-49645?

This vulnerability exists in the DRM Panfrost graphics driver where calling the madvise IOCTL twice on a buffer object (BO) causes the kernel to attempt adding it to the memory shrinker list twice, corrupting critical kernel data structures and triggering system crashes.

Is CVE-2022-49645 being actively exploited?

No, this vulnerability is not actively exploited in the wild and no public exploits are available. It requires local access and knowledge of the specific madvise IOCTL sequence to trigger.

What versions of Kernel are affected by CVE-2022-49645?

Linux kernel versions 5.16.0 through 5.18.12 are affected. The fix is included starting with kernel version 5.18.13 and all subsequent releases.

How do I check if my server is vulnerable to CVE-2022-49645?

Run `uname -r` to check your kernel version. If it displays a version between 5.16 and 5.18.12 (e.g., 5.17.5 or 5.18.11), your system is vulnerable if Panfrost GPU support is enabled.

Does Defensia detect CVE-2022-49645?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If Kernel is installed on a monitored server, CVE-2022-49645 will appear in your dashboard with remediation steps.

Related Kernel CVEs

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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.
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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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