7.8

CVE-2023-53557: linux

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2023-53557DEBIAN-CVE-2023-53557
Published 04-10-2025Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2023-53557 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 3.9% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.15%
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 12 · Related 12
SUSE-SU-2025:21040-1SUSE-SU-2025:21052-1SUSE-SU-2025:21056-1SUSE-SU-2025:21064-1SUSE-SU-2025:4057-1SUSE-SU-2025:4128-1

Timeline

  1. 04-10-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: fprobe: Release rethook after the ftrace_ops is unregistered While running bpf selftests it's possible to get following fault: general protection fault, probably for non-canonical address \ 0x6b6b6b6b6b6b6b6b: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC NOPTI ... Call Trace: <TASK> fprobe_handler+0xc1/0x270 ? __pfx_bpf_testmod_init+0x10/0x10 ? __pfx_bpf_testmod_init+0x10/0x10 ? bpf_fentry_test1+0x5/0x10 ? bpf_fentry_test1+0x5/0x10 ? bpf_testmod_init+0x22/0x80 ? do_one_initcall+0x63/0x2e0 ? rcu_is_watching+0xd/0x40 ? kmalloc_trace+0xaf/0xc0 ? do_init_module+0x60/0x250 ? __do_sys_finit_module+0xac/0x120 ? do_syscall_64+0x37/0x90 ? entry_SYSCALL_64_after_hwframe+0x72/0xdc </TASK> In unregister_fprobe function we can't release fp->rethook while it's possible there are some of its users still running on another cpu. Moving rethook_free call after fp->ops is unregistered with unregister_ftrace_function call.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.15%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

0.00 pp

From 0.15% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.15%

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

No weakness data has been published for this record.

Affected systems

Ubuntu84 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
  • linux-aws-5.19All versions (No fix recorded)
Linux2 products
  • linux≥ 5b0ab78998e32564a011b14c4c7f9c81e2d42b9d, < ce3ec57faff559ccae1e0150c1f077eb2df648a4 | ≥ 5b0ab78998e32564a011b14c4c7f9c81e2d42b9d, < 03d63255a5783243c110aec5e6ae2f1475c3be76 | ≥ 5b0ab78998e32564a011b14c4c7f9c81e2d42b9d, < 5f81018753dfd4989e33ece1f0cb6b8aae498b82 | 5.18
  • linux_kernel≥ 5.18, < 6.1.40 | ≥ 6.2, < 6.4.5 | 6.5:rc1
Debian1 product
  • linux< 6.1.52-1 | < 6.4.11-1

3 vendors · 87 products

References

7 links