high CVSS 7.8

CVE-2024-53106·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: ima: fix buffer overrun in ima_eventdigest_init_common Function ima_eventdigest_init() calls ima_eventdigest_init_common() with HASH_ALGO__LAST which is then used to access the array hash_digest_size[] leading to buffer overrun. Have a conditional statement to handle this.

Severity
high
Software
Kernel
Fixed in
6.11.10
Published
2024-12-02

Affected versions

From: 6.7

Until: 6.11.10

Fixed in: 6.11.10

How to fix this CVE

Update your Linux kernel to version 6.11.10 or later to patch a buffer overrun vulnerability in the IMA (Integrity Measurement Architecture) subsystem. This flaw allows local authenticated users with low privileges to trigger memory corruption by passing invalid hash algorithm identifiers to kernel functions. Affected systems running kernel versions 6.7 through 6.11.9 should prioritize this update to prevent potential denial of service or privilege escalation attacks.

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 and confirm if it falls within the vulnerable range (6.7 to 6.11.9)
  2. Verify IMA is enabled on your system by checking 'cat /proc/cmdline | grep ima_policy' or 'grep CONFIG_IMA /boot/config-$(uname -r)'
  3. Search kernel logs for IMA-related errors using 'grep -i ima /var/log/kern.log' or 'journalctl -k | grep -i ima' to identify any buffer overrun warnings
  4. After updating, run 'uname -r' again to confirm the kernel has been upgraded to 6.11.10 or later, then reboot if necessary

FAQ

What is CVE-2024-53106?

CVE-2024-53106 is a buffer overrun vulnerability in the Linux kernel's IMA (Integrity Measurement Architecture) event digest initialization function. The flaw occurs when an invalid hash algorithm identifier is passed to the kernel, causing it to access memory beyond the bounds of the hash_digest_size array, potentially leading to information disclosure or system instability.

Is CVE-2024-53106 being actively exploited?

No, CVE-2024-53106 is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog and no public exploits are currently available. However, the vulnerability requires local authentication and should still be patched promptly as a best practice.

What versions of Kernel are affected by CVE-2024-53106?

Linux kernel versions 6.7 through 6.11.9 are affected. The vulnerability has been fixed in kernel version 6.11.10 and later.

How do I check if my server is vulnerable to CVE-2024-53106?

Run 'uname -r' to display your kernel version. If it shows a version between 6.7 and 6.11.9, your system is vulnerable. Cross-reference the version number with the fixed release 6.11.10.

Does Defensia detect CVE-2024-53106?

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-2024-53106 will appear in your dashboard with remediation steps.

Related Kernel CVEs

CVE-2024-42256CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: cifs: Fix server re-repick on subrequest retry When a subrequest is marked for needing retry, netfs will call cifs_prepare_write() which will make cifs repick the server for the op before renegotiating credits; it then calls cifs_issue_write() which invokes smb2_async_writev() - which re-repicks the server. If a different server is then selected, this causes the increment of server->in_flight to happen against one record and the decrement to happen against another, leading to misaccounting. Fix this by just removing the repick code in smb2_async_writev(). As this is only called from netfslib-driven code, cifs_prepare_write() should always have been called first, and so server should never be NULL and the preparatory step is repeated in the event that we do a retry. The problem manifests as a warning looking something like: WARNING: CPU: 4 PID: 72896 at fs/smb/client/smb2ops.c:97 smb2_add_credits+0x3f0/0x9e0 [cifs] ... RIP: 0010:smb2_add_credits+0x3f0/0x9e0 [cifs] ... smb2_writev_callback+0x334/0x560 [cifs] cifs_demultiplex_thread+0x77a/0x11b0 [cifs] kthread+0x187/0x1d0 ret_from_fork+0x34/0x60 ret_from_fork_asm+0x1a/0x30 Which may be triggered by a number of different xfstests running against an Azure server in multichannel mode. generic/249 seems the most repeatable, but generic/215, generic/249 and generic/308 may also show it.
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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