CVE-2025-22030

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Source
https://nvd.nist.gov/vuln/detail/CVE-2025-22030
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-22030.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-22030
Downstream
Related
Published
2025-04-16T14:11:50Z
Modified
2025-10-15T01:42:10.630681Z
Summary
mm: zswap: fix crypto_free_acomp() deadlock in zswap_cpu_comp_dead()
Details

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

mm: zswap: fix cryptofreeacomp() deadlock in zswapcpucomp_dead()

Currently, zswapcpucompdead() calls cryptofreeacomp() while holding the per-CPU acompctx mutex. cryptofreeacomp() then holds scomplock (through cryptoexitscompops_async()).

On the other hand, cryptoallocacompnode() holds the scomplock (through cryptoscompinittfm()), and then allocates memory. If the allocation results in reclaim, we may attempt to hold the per-CPU acompctx mutex.

The above dependencies can cause an ABBA deadlock. For example in the following scenario:

(1) Task A running on CPU #1: cryptoallocacompnode() Holds scomplock Enters reclaim Reads percpuptr(pool->acomp_ctx, 1)

(2) Task A is descheduled

(3) CPU #1 goes offline zswapcpucompdead(CPU #1) Holds percpuptr(pool->acompctx, 1)) Calls cryptofreeacomp() Waits for scomp_lock

(4) Task A running on CPU #2: Waits for percpuptr(pool->acomp_ctx, 1) // Read on CPU #1 DEADLOCK

Since there is no requirement to call cryptofreeacomp() with the per-CPU acompctx mutex held in zswapcpucompdead(), move it after the mutex is unlocked. Also move the acomprequestfree() and kfree() calls for consistency and to avoid any potential sublte locking dependencies in the future.

With this, only setting acompctx fields to NULL occurs with the mutex held. This is similar to how zswapcpucompprepare() only initializes acomp_ctx fields with the mutex held, after performing all allocations before holding the mutex.

Opportunistically, move the NULL check on acomp_ctx so that it takes place before the mutex dereference.

References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
8d29ff5d50304daa41dc3cfdda4a9d1e46cf5be1
Fixed
747e3eec1d7d124ea90ed3d7b85369df8b4e36d2
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
12dcb0ef540629a281533f9dedc1b6b8e14cfb65
Fixed
a8d18000e9d2d97aaf105f5f9b3b0e8a6fbf8b96
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
12dcb0ef540629a281533f9dedc1b6b8e14cfb65
Fixed
717d9c35deff6c33235693171bacbb03e9643fa4
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
12dcb0ef540629a281533f9dedc1b6b8e14cfb65
Fixed
c11bcbc0a517acf69282c8225059b2a8ac5fe628

Affected versions

v6.*

v6.12.12
v6.12.13
v6.12.14
v6.12.15
v6.12.16
v6.12.17
v6.12.18
v6.12.19
v6.12.20
v6.12.21
v6.12.22
v6.13
v6.13-rc7
v6.13.1
v6.13.10
v6.13.2
v6.13.3
v6.13.4
v6.13.5
v6.13.6
v6.13.7
v6.13.8
v6.13.9
v6.14
v6.14-rc1
v6.14-rc2
v6.14-rc3
v6.14-rc4
v6.14-rc5
v6.14-rc6
v6.14-rc7
v6.14.1

Database specific 

{
    "vanir_signatures": [
        {
            "id": "CVE-2025-22030-659a08f0",
            "signature_type": "Line",
            "target": {
                "file": "mm/zswap.c"
            },
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@747e3eec1d7d124ea90ed3d7b85369df8b4e36d2",
            "digest": {
                "threshold": 0.9,
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            },
            "deprecated": false,
            "signature_version": "v1"
        },
        {
            "id": "CVE-2025-22030-7ffe886a",
            "signature_type": "Function",
            "target": {
                "file": "mm/zswap.c",
                "function": "zswap_cpu_comp_dead"
            },
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@717d9c35deff6c33235693171bacbb03e9643fa4",
            "digest": {
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                "length": 466.0
            },
            "deprecated": false,
            "signature_version": "v1"
        },
        {
            "id": "CVE-2025-22030-896bc41f",
            "signature_type": "Function",
            "target": {
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            },
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@c11bcbc0a517acf69282c8225059b2a8ac5fe628",
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            },
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            "signature_version": "v1"
        },
        {
            "id": "CVE-2025-22030-a7593a71",
            "signature_type": "Line",
            "target": {
                "file": "mm/zswap.c"
            },
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@a8d18000e9d2d97aaf105f5f9b3b0e8a6fbf8b96",
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        },
        {
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            },
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            },
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            },
            "deprecated": false,
            "signature_version": "v1"
        },
        {
            "id": "CVE-2025-22030-c5a9d87f",
            "signature_type": "Function",
            "target": {
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            },
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@747e3eec1d7d124ea90ed3d7b85369df8b4e36d2",
            "digest": {
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                "length": 466.0
            },
            "deprecated": false,
            "signature_version": "v1"
        },
        {
            "id": "CVE-2025-22030-d1189b8b",
            "signature_type": "Function",
            "target": {
                "file": "mm/zswap.c",
                "function": "zswap_cpu_comp_dead"
            },
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            "digest": {
                "function_hash": "284926331846220598011350313426294947463",
                "length": 466.0
            },
            "deprecated": false,
            "signature_version": "v1"
        }
    ]
}

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.12.23
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.13.11
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.14.2