Vulnerability-Lookup

FKIE_CVE-2026-43090

Vulnerability from fkie_nvd - Published: 2026-05-06 10:16 - Updated: 2026-05-19 20:44

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: xfrm: fix refcount leak in xfrm_migrate_policy_find syzkaller reported a memory leak in xfrm_policy_alloc: BUG: memory leak unreferenced object 0xffff888114d79000 (size 1024): comm "syz.1.17", pid 931 ... xfrm_policy_alloc+0xb3/0x4b0 net/xfrm/xfrm_policy.c:432 The root cause is a double call to xfrm_pol_hold_rcu() in xfrm_migrate_policy_find(). The lookup function already returns a policy with held reference, making the second call redundant. Remove the redundant xfrm_pol_hold_rcu() call to fix the refcount imbalance and prevent the memory leak. Found by Linux Verification Center (linuxtesting.org) with Syzkaller.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/21e235a36cfb6d145cefb10728f12f5dc5412f54	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/70c2a89a3bc207c3bfbf6f21bb439809e0a4a27a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/83317cce60a032c49480dcdabe146435bd689d03	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/836ee1b0426ea3db31531e9581cc32f513d24e32	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

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    }
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  "id": "CVE-2026-43090",
  "lastModified": "2026-05-19T20:44:03.047",
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          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
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          "scope": "UNCHANGED",
          "userInteraction": "NONE",
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          "version": "3.1"
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        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
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}

CVE-2026-43090 (GCVE-0-2026-43090)

Vulnerability from cvelistv5 – Published: 2026-05-06 07:40 – Updated: 2026-05-11 22:17

Title

xfrm: fix refcount leak in xfrm_migrate_policy_find

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

4 references

URL	Tags
https://git.kernel.org/stable/c/21e235a36cfb6d145…
https://git.kernel.org/stable/c/836ee1b0426ea3db3…
https://git.kernel.org/stable/c/70c2a89a3bc207c3b…
https://git.kernel.org/stable/c/83317cce60a032c49…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 563d5ca93e883b9dcb4b7dc8967ac569fd91820d , < 21e235a36cfb6d145cefb10728f12f5dc5412f54 (git) Affected: 563d5ca93e883b9dcb4b7dc8967ac569fd91820d , < 836ee1b0426ea3db31531e9581cc32f513d24e32 (git) Affected: 563d5ca93e883b9dcb4b7dc8967ac569fd91820d , < 70c2a89a3bc207c3bfbf6f21bb439809e0a4a27a (git) Affected: 563d5ca93e883b9dcb4b7dc8967ac569fd91820d , < 83317cce60a032c49480dcdabe146435bd689d03 (git)
Linux	Linux	Affected: 6.12 Unaffected: 0 , < 6.12 (semver) Unaffected: 6.12.83 , ≤ 6.12.* (semver) Unaffected: 6.18.24 , ≤ 6.18.* (semver) Unaffected: 6.19.14 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-43090

CVE-2026-43090 (GCVE-0-2026-43090)

Tags

Sightings

Nomenclature