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NVD / CVE Program· CNA Linux

CVE-2022-50569: xfrm: Update ipcomp_scratches with NULL when freed

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.17% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 03155680191ef0f004b1d6a5714c5b8cd271ab61, 18373ed500f7cd53e24d9b0bd0f1c09d78dba87e, 1e8abde895b3ac6a368cbdb372e8800c49e73a28.

Low priority for now. Upgrade to Linux Linux 03155680191ef0f004b1d6a5714c5b8cd271ab61, 18373ed500f7cd53e24d9b0bd0f1c09d78dba87e, 1e8abde895b3ac6a368cbdb372e8800c49e73a28 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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 we free, static void ipcomp_free_scratches(void) { ... scratches = ipcomp_scratches; Assigning obsolete address from ipcomp_scratches if (!scratches) return; for_each_possible_cpu(i) vfree(*per_cpu_ptr(scratches, i)); Trying to free non existent page, causing warning: trying to vfree existent vm area. ... } Fix this breakage by updating ipcomp_scrtches with NULL when scratches is freed

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Oct 22, 2025
Updated
Aug 5, 2026
EPSS
0.1% · 6th percentile
CWE
—

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CNA vs NVD score

NVD
—
CNA · Linux
7.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 2.6.12affected
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before debca61df6bc2f65e020656c9c5b878d6b38d30faffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before a39f456d62810c0efb43cead22f98d95b53e4b1aaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 1e8abde895b3ac6a368cbdb372e8800c49e73a28affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 18373ed500f7cd53e24d9b0bd0f1c09d78dba87eaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before be81c44242b20fc3bdcc73480ef8aaee56f5d0b6affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 03155680191ef0f004b1d6a5714c5b8cd271ab61affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before f3bdba4440d82e0da2b1bfc35d3836c8a8e00677affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 2c19945ce8095d065df550e7fe350cd5cc40c6e6affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 8a04d2fc700f717104bfb95b0f6694e448a4537faffected · git

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.0.3-16.0.3-1
SUSE:Linux Enterprise Live Patching 12 SP5kernel-defaultbefore 4.12.14-122.283.14.12.14-122.283.1
SUSE:Linux Enterprise Live Patching 12 SP5kgraft-patch-SLE12-SP5_Update_75before 1-8.3.11-8.3.1
SUSE:Linux Enterprise Server 12 SP5-LTSSkernel-sourcebefore 4.12.14-122.283.14.12.14-122.283.1
SUSE:Linux Enterprise Server 12 SP5-LTSSkernel-symsbefore 4.12.14-122.283.14.12.14-122.283.1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2022-50567Oct 22, 2025 · fs: jfs: fix shift-out-of-bounds in dbAllocAG
    31Monitor
  • ← EarlierCVE-2022-50568Oct 22, 2025 · usb: gadget: f_hid: fix f_hidg lifetime vs cdev
    0Monitor
  • Later →CVE-2022-50570Oct 22, 2025 · platform/chrome: fix memory corruption in ioctl
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux03155680191ef0f004b1d6a5714c5b8cd271ab61Vendor (CNA)
Linux Linux18373ed500f7cd53e24d9b0bd0f1c09d78dba87eVendor (CNA)
Linux Linux1e8abde895b3ac6a368cbdb372e8800c49e73a28Vendor (CNA)
Linux Linux2c19945ce8095d065df550e7fe350cd5cc40c6e6Vendor (CNA)
Linux Linux8a04d2fc700f717104bfb95b0f6694e448a4537fVendor (CNA)
Linux Linuxa39f456d62810c0efb43cead22f98d95b53e4b1aVendor (CNA)
Linux Linuxbe81c44242b20fc3bdcc73480ef8aaee56f5d0b6Vendor (CNA)
Linux Linuxdebca61df6bc2f65e020656c9c5b878d6b38d30fVendor (CNA)
Linux Linuxf3bdba4440d82e0da2b1bfc35d3836c8a8e00677Vendor (CNA)
debian:linux6.0.3-1 · Debian:12Package registry (OSV)
suse:kernel-default4.12.14-122.283.1 · SUSE:Linux Enterprise Live Patching 12 SP5Package registry (OSV)
suse:kernel-source4.12.14-122.283.1 · SUSE:Linux Enterprise Server 12 SP5-LTSSPackage registry (OSV)
suse:kernel-syms4.12.14-122.283.1 · SUSE:Linux Enterprise Server 12 SP5-LTSSPackage registry (OSV)
suse:kgraft-patch-SLE12-SP5_Update_751-8.3.1 · SUSE:Linux Enterprise Live Patching 12 SP5Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (8 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records