Vulnerability in Kernel (CVE-2023-52560)

Summary

Vulnerability in Kernel (CVE-2023-52560). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 6.1.56, 6.5.6 or later.

Original description

The description as published by the source.

In the Linux kernel, the following vulnerability has been resolved:

mm/damon/vaddr-test: fix memory leak in damon_do_test_apply_three_regions()

When CONFIG_DAMON_VADDR_KUNIT_TEST=y and making CONFIG_DEBUG_KMEMLEAK=y
and CONFIG_DEBUG_KMEMLEAK_AUTO_SCAN=y, the below memory leak is detected.

Since commit 9f86d624292c ("mm/damon/vaddr-test: remove unnecessary
variables"), the damon_destroy_ctx() is removed, but still call
damon_new_target() and damon_new_region(), the damon_region which is
allocated by kmem_cache_alloc() in damon_new_region() and the damon_target
which is allocated by kmalloc in damon_new_target() are not freed. And
the damon_region which is allocated in damon_new_region() in
damon_set_regions() is also not freed.

So use damon_destroy_target to free all the damon_regions and damon_target.

unreferenced object 0xffff888107c9a940 (size 64):
  comm "kunit_try_catch", pid 1069, jiffies 4294670592 (age 732.761s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 06 00 00 00 6b 6b 6b 6b  ............kkkk
    60 c7 9c 07 81 88 ff ff f8 cb 9c 07 81 88 ff ff  `...............
  backtrace:
    [] kmalloc_trace+0x27/0xa0
    [] damon_new_target+0x3f/0x1b0
    [] damon_do_test_apply_three_regions.constprop.0+0x95/0x3e0
    [] damon_test_apply_three_regions1+0x21e/0x260
    [] kunit_generic_run_threadfn_adapter+0x4a/0x90
    [] kthread+0x2b6/0x380
    [] ret_from_fork+0x2d/0x70
    [] ret_from_fork_asm+0x11/0x…

Source: OSV.dev (Open Source Vulnerabilities) NVD OSV

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2023-52560 has been found in Kernel.
Risk of unauthorized operations or information disclosure.
What to do: upgrade Kernel to 6.1.56, 6.5.6 or later.
If unsure, ask your IT team or search "Kernel CVE-2023-52560" on the vendor's site.

CVE-2023-52560 (Kernel)
Patched: 6.1.56, 6.5.6 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (unclassified) exists in Kernel.

📍 Affected scope

Check the vendor advisory for the affected versions of Kernel.

🔥 Severity

Severity: ?. Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to 6.1.56, 6.5.6.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'Kernel' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

1
Identify exposure identify
```
grep -r 'Kernel' . | grep -v node_modules
```
リポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で Kernel を grep し、稼働しているサービス・バージョンを把握する。
2
Apply patch patch
```
Upgrade Kernel to 6.1.56, 6.5.6
```
ステージング環境で 6.1.56, 6.5.6 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
3
Post-deployment verification verify
```
Confirm patched version is live in production
```
パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

Linux Kernel

[{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.56"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.5.6"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

Debian DEBIAN-CVE-2023-52560 linux Fixed in: 6.1.64-1