CVE-2024-42136

HIGH EPSS 14.5%
Published Jul 30, 20241y ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Jul 30, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: cdrom: rearrange last_media_change check to avoid unintentional overflow When running syzkaller with the newly reintroduced signed integer wrap sanitizer we encounter this splat: [ 366.015950] UBSAN: signed-integer-overflow in ../drivers/cdrom/cdrom.c:2361:33 [ 366.021089] -9223372036854775808 - 346321 cannot be represented in type '__s64' (aka 'long long') [ 366.025894] program syz-executor.4 is using a deprecated SCSI ioctl, please convert it to SG_IO [ 366.027502] CPU: 5 PID: 28472 Comm: syz-executor.7 Not tainted 6.8.0-rc2-00035-gb3ef86b5a957 #1 [ 366.027512] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 366.027518] Call Trace: [ 366.027523] <TASK> [ 366.027533] dump_stack_lvl+0x93/0xd0 [ 366.027899] handle_overflow+0x171/0x1b0 [ 366.038787] ata1.00: invalid multi_count 32 ignored [ 366.043924] cdrom_ioctl+0x2c3f/0x2d10 [ 366.063932] ? __pm_runtime_resume+0xe6/0x130 [ 366.071923] sr_block_ioctl+0x15d/0x1d0 [ 366.074624] ? __pfx_sr_block_ioctl+0x10/0x10 [ 366.077642] blkdev_ioctl+0x419/0x500 [ 366.080231] ? __pfx_blkdev_ioctl+0x10/0x10 ... Historically, the signed integer overflow sanitizer did not work in the kernel due to its interaction with `-fwrapv` but this has since been changed [1] in the newest version of Clang. It was re-enabled in the kernel with Commit 557f8c582a9ba8ab ("ubsan: Reintroduce signed overflow sanitizer"). Let's rearrange the check to not perform any arithmetic, thus not tripping the sanitizer.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
14.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-190 Integer Overflow or Wraparound Numeric Error

Affected Products 4

VendorProductVersionRange
debiandebian_linux11.0any
linuxlinux_kernel*≥5.16  –  <6.1.98
linuxlinux_kernel*≥6.2  –  <6.6.39
linuxlinux_kernel*≥6.7  –  <6.9.9

References 5

  • git.kernel.org https://git.kernel.org/stable/c/0c97527e916054acc4a46ffb02842988acb2e92b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3ee21e14c8c329168a0b66bab00ecd18f5d0dee3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e809bc112712da8f7e15822674c6562da6cdf24c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/efb905aeb44b0e99c0e6b07865b1885ae0471ebf
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
    Mailing ListThird Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0c97527e916054acc4a46ffb02842988acb2e92b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3ee21e14c8c329168a0b66bab00ecd18f5d0dee3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e809bc112712da8f7e15822674c6562da6cdf24c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/efb905aeb44b0e99c0e6b07865b1885ae0471ebf
    Patch