CVE-2024-57874

MEDIUM EPSS 10.1%
Published Jan 11, 20251y ago · Modified Jun 17, 20262w ago
6.1 CVSS 3.1
Medium
Find Similar
Published Jan 11, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: arm64: ptrace: fix partial SETREGSET for NT_ARM_TAGGED_ADDR_CTRL Currently tagged_addr_ctrl_set() doesn't initialize the temporary 'ctrl' variable, and a SETREGSET call with a length of zero will leave this uninitialized. Consequently tagged_addr_ctrl_set() will consume an arbitrary value, potentially leaking up to 64 bits of memory from the kernel stack. The read is limited to a specific slot on the stack, and the issue does not provide a write mechanism. As set_tagged_addr_ctrl() only accepts values where bits [63:4] zero and rejects other values, a partial SETREGSET attempt will randomly succeed or fail depending on the value of the uninitialized value, and the exposure is significantly limited. Fix this by initializing the temporary value before copying the regset from userspace, as for other regsets (e.g. NT_PRSTATUS, NT_PRFPREG, NT_ARM_SYSTEM_CALL). In the case of a zero-length write, the existing value of the tagged address ctrl will be retained. The NT_ARM_TAGGED_ADDR_CTRL regset is only visible in the user_aarch64_view used by a native AArch64 task to manipulate another native AArch64 task. As get_tagged_addr_ctrl() only returns an error value when called for a compat task, tagged_addr_ctrl_get() and tagged_addr_ctrl_set() should never observe an error value from get_tagged_addr_ctrl(). Add a WARN_ON_ONCE() to both to indicate that such an error would be unexpected, and error handlnig is not missing in either case.

CVSS Details

Base Score
6.1
Exploitability
1.8
Impact
4.2
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
10.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-908

Affected Products 6

VendorProductVersionRange
linuxlinux_kernel*≥5.10  –  <5.10.231
linuxlinux_kernel*≥5.11  –  <5.15.174
linuxlinux_kernel*≥5.16  –  <6.1.120
linuxlinux_kernel*≥6.2  –  <6.6.66
linuxlinux_kernel*≥6.7  –  <6.12.5
linuxlinux_kernel6.13any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/1152dd13845efde5554f80c7e1233bae1d26bd3e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1370cf3eb5495d70e00547598583a4cd45b40b99
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1c176f5155ee6161fee6f416b64aa50394d3f220
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/96035c0093db258975b8887676afe59a64c34a72
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/abd614bbfcee73247495bd9472da8f85ac83546e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ca62d90085f4af36de745883faab9f8a7cbb45d3
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/1152dd13845efde5554f80c7e1233bae1d26bd3e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1370cf3eb5495d70e00547598583a4cd45b40b99
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1c176f5155ee6161fee6f416b64aa50394d3f220
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/96035c0093db258975b8887676afe59a64c34a72
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/abd614bbfcee73247495bd9472da8f85ac83546e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ca62d90085f4af36de745883faab9f8a7cbb45d3
    Patch