7.1

CVE-2023-52504: linux Out-of-bounds Read

CVSS: 7.1v3.1HighAnalyzed
AliasesUBUNTU-CVE-2023-52504DEBIAN-CVE-2023-52504
Published 02-03-2024Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2023-52504 is a high (CVSS 7.1) Out-of-bounds Read vulnerability in linux. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 18.9% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v3.1 (NVD)
EPSS score
0.28%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 7 · Related 7
SUSE-SU-2024:1320-1SUSE-SU-2024:1321-1SUSE-SU-2024:1466-1SUSE-SU-2024:1480-1SUSE-SU-2024:1490-1USN-6831-1

Timeline

  1. 02-03-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: x86/alternatives: Disable KASAN in apply_alternatives() Fei has reported that KASAN triggers during apply_alternatives() on a 5-level paging machine: BUG: KASAN: out-of-bounds in rcu_is_watching() Read of size 4 at addr ff110003ee6419a0 by task swapper/0/0 ... __asan_load4() rcu_is_watching() trace_hardirqs_on() text_poke_early() apply_alternatives() ... On machines with 5-level paging, cpu_feature_enabled(X86_FEATURE_LA57) gets patched. It includes KASAN code, where KASAN_SHADOW_START depends on __VIRTUAL_MASK_SHIFT, which is defined with cpu_feature_enabled(). KASAN gets confused when apply_alternatives() patches the KASAN_SHADOW_START users. A test patch that makes KASAN_SHADOW_START static, by replacing __VIRTUAL_MASK_SHIFT with 56, works around the issue. Fix it for real by disabling KASAN while the kernel is patching alternatives. [ mingo: updated the changelog ]

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.28%

Chance of exploitation in the next 30 days

Percentile

19%

Versus all other CVEs

30-day change

0.00 pp

From 0.28% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.28%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu110 products
  • linux< 5.4.0-186.206 | < 5.15.0-94.104
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.4.0-1126.136 | < 5.15.0-1053.58
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 6657fca06e3ffab8d0b3f9d8b397f5ee498952d7, < 3719d3c36aa853d5a2401af9f8d6b116c91ad5ae | ≥ 6657fca06e3ffab8d0b3f9d8b397f5ee498952d7, < 3770c38cd6a60494da29ac2da73ff8156440a2d1 | ≥ 6657fca06e3ffab8d0b3f9d8b397f5ee498952d7, < 6788b10620ca6e98575d1e06e72a8974aad7657e | ≥ 6657fca06e3ffab8d0b3f9d8b397f5ee498952d7, < ecba5afe86f30605eb9dfb7f265a8de0218d4cfc | ≥ 6657fca06e3ffab8d0b3f9d8b397f5ee498952d7, < 5b784489c8158518bf7a466bb3cc045b0fb66b4b | ≥ 6657fca06e3ffab8d0b3f9d8b397f5ee498952d7, < cd287cc208dfe6bd6da98e7f88e723209242c9b4 | ≥ 6657fca06e3ffab8d0b3f9d8b397f5ee498952d7, < d35652a5fc9944784f6f50a5c979518ff8dacf61 | 4.17
  • linux_kernel≥ 4.17, < 4.19.297 | ≥ 4.20, < 5.4.270 | ≥ 5.5, < 5.10.199 | ≥ 5.11, < 5.15.136 | ≥ 5.16, < 6.1.59 | ≥ 6.2, < 6.5.8 | 6.6:rc1 | 6.6:rc2 | 6.6:rc3 | 6.6:rc4 | 6.6:rc5
Debian1 product
  • linux< 6.1.64-1 | < 6.5.8-1

3 vendors · 113 products

References

13 links
Show all 13 references