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Review reviewHigh

CVE-2022-50569

Linux

In the Linux kernel, the following vulnerability has been resolved: xfrm: Update ipcomp_scratches with NULL when freed Currently if ipcomp_alloc_scratches() fails to allocate memory ipcomp_scratches holds obsolete address. So when we try to free the percpu scratches using ipcomp_free_scratches() it tries to vfree non existent vm area. Described below: static void * __percpu *ipcomp_alloc_scratches(void) { ... scratches = alloc_percpu(void *); if (!scratches) return NULL; ipcomp_scratches does not know about this allocation failure. Therefore holding the old obsolete address. ... } So when w...

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2025.10.22
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: xfrm: Update ipcomp_scratches with NULL when freed Currently if ipcomp_alloc_scratches() fails to allocate memory ipcomp_scratches holds obsolete address. So when we try to free the percpu scratches using ipcomp_free_scratches() it tries to vfree non existent vm area. Described below: static void * __percpu *ipcomp_alloc_scratches(void) { ... scratches = alloc_percpu(void *); if (!scratches) return NULL; ipcomp_scratches does not know about this allocation failure. Therefore holding the old obsolete address. ... } So when w...

Affected product and versions

Product
Linux
Affected versions
>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < debca61df6bc2f65e020656c9c5b878d6b38d30f, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a39f456d62810c0efb43cead22f98d95b53e4b1a, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1e8abde895b3ac6a368cbdb372e8800c49e73a28, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 18373ed500f7cd53e24d9b0bd0f1c09d78dba87e, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < be81c44242b20fc3bdcc73480ef8aaee56f5d0b6, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 03155680191ef0f004b1d6a5714c5b8cd271ab61, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < f3bdba4440d82e0da2b1bfc35d3836c8a8e00677, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2c19945ce8095d065df550e7fe350cd5cc40c6e6, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 8a04d2fc700f717104bfb95b0f6694e448a4537f, >= 2.6.12
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available