SECUFOCUSNOW
Home›CVE index›CVE-2026-23010
Review reviewHigh

CVE-2026-23010

Linux Linux, SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP

In the Linux kernel, the following vulnerability has been resolved: ipv6: Fix use-after-free in inet6_addr_del(). syzbot reported use-after-free of inet6_ifaddr in inet6_addr_del(). [0] The cited commit accidentally moved ipv6_del_addr() for mngtmpaddr before reading its ifp->flags for temporary addresses in inet6_addr_del(). Let's move ipv6_del_addr() down to fix the UAF. [0]: BUG: KASAN: slab-use-after-free in inet6_addr_del.constprop.0+0x67a/0x6b0 net/ipv6/addrconf.c:3117 Read of size 4 at addr ffff88807b89c86c by task syz.3.1618/9593 CPU: 0 UID: 0 PID: 9593 Comm: syz.3.1618 Not tainted...

CVSS
7.8
EPSS
0.18%
8.06% percentile
CISA KEV
Not listed
Published
2026.01.26
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.18%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: ipv6: Fix use-after-free in inet6_addr_del(). syzbot reported use-after-free of inet6_ifaddr in inet6_addr_del(). [0] The cited commit accidentally moved ipv6_del_addr() for mngtmpaddr before reading its ifp->flags for temporary addresses in inet6_addr_del(). Let's move ipv6_del_addr() down to fix the UAF. [0]: BUG: KASAN: slab-use-after-free in inet6_addr_del.constprop.0+0x67a/0x6b0 net/ipv6/addrconf.c:3117 Read of size 4 at addr ffff88807b89c86c by task syz.3.1618/9593 CPU: 0 UID: 0 PID: 9593 Comm: syz.3.1618 Not tainted...

Affected product and versions

Product
Linux Linux, SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
Affected versions
>= ca97dd10424860a3806ad3a9e26b9dce2901ee0c < 6e89d60b4f03014f7d412ce64b17a840840d490e, >= 836deb96383ed9c1a411f172954d74b3f74ec6ac < 9356b69d03d0f50cce91cebdabd33dda023fbd64, >= cb74207ef98317f8874a0b9780bb339c2eb700b0 < 2684610a9c9c53f262fd864fa5c407e79f304804, >= 00b5b7aab9e422d00d5a9d03d7e0760a76b5d57f < 8b6dcb565e419846bd521e31d5e1f98e4d0e1179, >= 00b5b7aab9e422d00d5a9d03d7e0760a76b5d57f < ddf96c393a33aef4887e2e406c76c2f8cda1419c, >= 851b3bb105c595cc20b8dcc1b4de029061ce2b76, >= 6.1.120 < 6.1.162, >= 6.6.64 < 6.6.122, >= 6.12.2 < 6.12.67, >= 6.11.11 < 6.12, >= 6.13, >= V3.1.6, >= 6.13.1 < 6.18.7, 6.13, 6.19
Fixed versions
6.1.162, 6.6.122, 6.12, 6.12.67, 6.18.7

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 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
CWE-416