CVE-2026-43090

MEDIUM EPSS 2.3%
Published May 6, 20261mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published May 6, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

Description

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
2.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 10

VendorProductVersionRange
linuxlinux_kernel*≥6.12  –  <6.12.83
linuxlinux_kernel*≥6.13  –  <6.18.24
linuxlinux_kernel*≥6.19  –  <6.19.14
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 4

  • git.kernel.org https://git.kernel.org/stable/c/21e235a36cfb6d145cefb10728f12f5dc5412f54
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/70c2a89a3bc207c3bfbf6f21bb439809e0a4a27a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/83317cce60a032c49480dcdabe146435bd689d03
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/836ee1b0426ea3db31531e9581cc32f513d24e32
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/21e235a36cfb6d145cefb10728f12f5dc5412f54
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/70c2a89a3bc207c3bfbf6f21bb439809e0a4a27a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/83317cce60a032c49480dcdabe146435bd689d03
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/836ee1b0426ea3db31531e9581cc32f513d24e32
    Patch