CVE-2024-56560: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: slab: Fix too strict alignment check in create_cache() On m68k, where the minimum alignment of unsigned long is 2 bytes: Kernel panic - not syncing: __kmem_cache_create_args: Failed to create slab 'io_kiocb'. Error -22 CPU: 0 UID: 0 PID: 1 Comm: swapper Not tainted 6.12.0-atari-03776-g7eaa1f99261a #1783 Stack from 0102fe5c: 0102fe5c 00514a2b 00514a2b ffffff00 00000001 0051f5ed 00425e78 00514a2b 0041eb74 ffffffea 00000310 0051f5ed ffffffea ffffffea 00601f60 00000044 0102ff20 000e7a68 0051ab8e 004383b8 0051f5ed ffffffea 000000b8 00000007 01020c00 00000000 000e77f0 0041e5f0 005f67c0 0051f5ed 000000b6 0102fef4 00000310 0102fef4 00000000 00000016 005f676c 0060a34c 00000010 00000004 00000038 0000009a 01000000 000000b8 005f668e 0102e000 00001372 0102ff88 Call Trace: [<00425e78>] dump_stack+0xc/0x10 [<0041eb74>] panic+0xd8/0x26c [<000e7a68>] __kmem_cache_create_args+0x278/0x2e8 [<000e77f0>] __kmem_cache_create_args+0x0/0x2e8 [<0041e5f0>] memset+0x0/0x8c [<005f67c0>] io_uring_init+0x54/0xd2 The minimal alignment of an integral type may differ from its size, hence is not safe to assume that an arbitrary freeptr_t (which is basically an unsigned long) is always aligned to 4 or 8 bytes. As nothing seems to require the additional alignment, it is safe to fix this by relaxing the check to the actual minimum alignment of freeptr_t.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Products

Vendor	Product	Versions
linux	linux_kernel	6.12 — 6.12.4

References

Advisories & Patches

https://git.kernel.org/stable/c/8b5aea5e5186733fa4e5aa4293b0a65a933f1a16 https://git.kernel.org/stable/c/9008fe8fad8255edfdbecea32d7eb0485d939d0d

Frequently Asked Questions

What is CVE-2024-56560? +

In the Linux kernel, the following vulnerability has been resolved: slab: Fix too strict alignment check in create_cache() On m68k, where the minimum alignment of unsigned long is 2 bytes: Kernel panic - not syncing: __kmem_cache_create_args: Failed to create slab 'io_kiocb'. Error -22 CPU: 0 UID: 0 PID: 1 Comm: swapper Not tainted 6.12.0-atari-03776-g7eaa1f99261a #1783 Stack from 0102fe5c: 0102fe5c 00514a2b 00514a2b ffffff00 00000001 0051f5ed 00425e78 00514a2b 0041eb74 ffffffea 00000310 0051f5ed ffffffea ffffffea 00601f60 00000044 0102ff20 000e7a68 0051ab8e 004383b8 0051f5ed ffffffea 000000b8 00000007 01020c00 00000000 000e77f0 0041e5f0 005f67c0 0051f5ed 000000b6 0102fef4 00000310 0102fef4 00000000 00000016 005f676c 0060a34c 00000010 00000004 00000038 0000009a 01000000 000000b8 005f668e 0102e000 00001372 0102ff88 Call Trace: [<00425e78>] dump_stack+0xc/0x10 [<0041eb74>] panic+0xd8/0x26c [<000e7a68>] __kmem_cache_create_args+0x278/0x2e8 [<000e77f0>] __kmem_cache_create_args+0x0/0x2e8 [<0041e5f0>] memset+0x0/0x8c [<005f67c0>] io_uring_init+0x54/0xd2 The minimal alignment of an integral type may differ from its size, hence is not safe to assume that an arbitrary freeptr_t (which is basically an unsigned long) is always aligned to 4 or 8 bytes. As nothing seems to require the additional alignment, it is safe to fix this by relaxing the check to the actual minimum alignment of freeptr_t. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-56560? +

CVE-2024-56560 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-56560? +

CVE-2024-56560 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-56560? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2024-56560