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NVD / CVE Program· CNA Linux

CVE-2026-23010: ipv6: Fix use-after-free in inet6_addr_del().

Noroxi assessment

Priority: Monitor (action score 31/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.20% (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 2684610a9c9c53f262fd864fa5c407e79f304804, 6.1.162, 6.12.

Low priority for now. Upgrade to Linux Linux 2684610a9c9c53f262fd864fa5c407e79f304804, 6.1.162, 6.12 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: 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 syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xcd/0x630 mm/kasan/report.c:482 kasan_report+0xe0/0x110 mm/kasan/report.c:595 inet6_addr_del.constprop.0+0x67a/0x6b0 net/ipv6/addrconf.c:3117 addrconf_del_ifaddr+0x11e/0x190 net/ipv6/addrconf.c:3181 inet6_ioctl+0x1e5/0x2b0 net/ipv6/af_inet6.c:582 sock_do_ioctl+0x118/0x280 net/socket.c:1254 sock_ioctl+0x227/0x6b0 net/socket.c:1375 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f164cf8f749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f164de64038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f164d1e5fa0 RCX: 00007f164cf8f749 RDX: 0000200000000000 RSI: 0000000000008936 RDI: 0000000000000003 RBP: 00007f164d013f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f164d1e6038 R14: 00007f164d1e5fa0 R15: 00007ffde15c8288 </TASK> Allocated by task 9593: kasan_save_stack+0x33/0x60 mm/kasan/common.c:56 kasan_save_track+0x14/0x30 mm/kasan/common.c:77 poison_kmalloc_redzone mm/kasan/common.c:397 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:414 kmalloc_noprof include/linux/slab.h:957 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] ipv6_add_addr+0x4e3/0x2010 net/ipv6/addrconf.c:1120 inet6_addr_add+0x256/0x9b0 net/ipv6/addrconf.c:3050 addrconf_add_ifaddr+0x1fc/0x450 net/ipv6/addrconf.c:3160 inet6_ioctl+0x103/0x2b0 net/ipv6/af_inet6.c:580 sock_do_ioctl+0x118/0x280 net/socket.c:1254 sock_ioctl+0x227/0x6b0 net/socket.c:1375 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 6099: kasan_save_stack+0x33/0x60 mm/kasan/common.c:56 kasan_save_track+0x14/0x30 mm/kasan/common.c:77 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:234 [inline] slab_free_hook mm/slub.c:2540 [inline] slab_free_freelist_hook mm/slub.c:2569 [inline] slab_free_bulk mm/slub.c:6696 [inline] kmem_cache_free_bulk mm/slub.c:7383 [inline] kmem_cache_free_bulk+0x2bf/0x680 mm/slub.c:7362 kfree_bulk include/linux/slab.h:830 [inline] kvfree_rcu_bulk+0x1b7/0x1e0 mm/slab_common.c:1523 kvfree_rcu_drain_ready mm/slab_common.c:1728 [inline] kfree_rcu_monitor+0x1d0/0x2f0 mm/slab_common.c:1801 process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257 process_scheduled_works kernel/workqu ---truncated---

HighCVSS 7.8 · v3.1—Proof of concept Fix available
Published
Jan 25, 2026
Updated
Oct 15, 2026
EPSS
0.2% · 9th percentile

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 · 0.2%

CNA vs NVD score

NVD
7.8
CNA · Linux
7.8
agree

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

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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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.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel6.1.120 and later · before 6.1.162
  • linux linux kernel6.6.64 and later · before 6.6.122
  • linux linux kernel6.11.11 and later · before 6.12
  • linux linux kernel6.12.2 and later · before 6.12.67
  • linux linux kernel6.13.1 and later · before 6.18.7
  • linux linux kernel6.13
  • linux linux kernel6.19

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

    • 851b3bb105c595cc20b8dcc1b4de029061ce2b76, 6.13affected
    • ca97dd10424860a3806ad3a9e26b9dce2901ee0c and later · before 6e89d60b4f03014f7d412ce64b17a840840d490eaffected · git
    • 836deb96383ed9c1a411f172954d74b3f74ec6ac and later · before 9356b69d03d0f50cce91cebdabd33dda023fbd64affected · git
    • cb74207ef98317f8874a0b9780bb339c2eb700b0 and later · before 2684610a9c9c53f262fd864fa5c407e79f304804affected · git
    • 00b5b7aab9e422d00d5a9d03d7e0760a76b5d57f and later · before 8b6dcb565e419846bd521e31d5e1f98e4d0e1179affected · git
    • 00b5b7aab9e422d00d5a9d03d7e0760a76b5d57f and later · before ddf96c393a33aef4887e2e406c76c2f8cda1419caffected · git
    • 6.1.120 and later · before 6.1.162affected · semver
    • 6.6.64 and later · before 6.6.122affected · semver
    • 6.12.2 and later · before 6.12.67affected · semver
    • 6.11.11 and later · before 6.12affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:10kernel-abi-stablelistsbefore 6.12.0-124.45.1.el10_16.12.0-124.45.1.el10_1
AlmaLinux:10kernel-docbefore 6.12.0-124.45.1.el10_16.12.0-124.45.1.el10_1
Debian:12linuxbefore 6.1.162-16.1.162-1
Debian:13linuxbefore 6.12.69-16.12.69-1
Debian:14linuxbefore 6.18.8-16.18.8-1
Red Hat:enterprise_linux:10.1kernelbefore 0:6.12.0-124.45.1.el10_10:6.12.0-124.45.1.el10_1
Red Hat:enterprise_linux:10.1kernel-64kbefore 0:6.12.0-124.45.1.el10_10:6.12.0-124.45.1.el10_1
Red Hat:enterprise_linux:10.1kernel-64k-corebefore 0:6.12.0-124.45.1.el10_10:6.12.0-124.45.1.el10_1
Red Hat:enterprise_linux:10.1kernel-64k-debugbefore 0:6.12.0-124.45.1.el10_10:6.12.0-124.45.1.el10_1
Red Hat:enterprise_linux:10.1kernel-64k-debug-corebefore 0:6.12.0-124.45.1.el10_10:6.12.0-124.45.1.el10_1
Red Hat:enterprise_linux:10.1kernel-64k-debug-debuginfobefore 0:6.12.0-124.45.1.el10_10:6.12.0-124.45.1.el10_1
Red Hat:enterprise_linux:10.1kernel-64k-debug-develbefore 0:6.12.0-124.45.1.el10_10:6.12.0-124.45.1.el10_1
Red Hat:enterprise_linux:10.1kernel-64k-debug-devel-matchedbefore 0:6.12.0-124.45.1.el10_10:6.12.0-124.45.1.el10_1
Red Hat:enterprise_linux:10.1kernel-64k-debug-modulesbefore 0:6.12.0-124.45.1.el10_10:6.12.0-124.45.1.el10_1
Red Hat:enterprise_linux:10.1kernel-64k-debug-modules-corebefore 0:6.12.0-124.45.1.el10_10:6.12.0-124.45.1.el10_1
Red Hat:enterprise_linux:10.1kernel-64k-debug-modules-extrabefore 0:6.12.0-124.45.1.el10_10:6.12.0-124.45.1.el10_1
Red Hat:enterprise_linux:10.1kernel-64k-debuginfobefore 0:6.12.0-124.45.1.el10_10:6.12.0-124.45.1.el10_1
Red Hat:enterprise_linux:10.1kernel-64k-develbefore 0:6.12.0-124.45.1.el10_10:6.12.0-124.45.1.el10_1
Red Hat:enterprise_linux:10.1kernel-64k-devel-matchedbefore 0:6.12.0-124.45.1.el10_10:6.12.0-124.45.1.el10_1
Red Hat:enterprise_linux:10.1kernel-64k-modulesbefore 0:6.12.0-124.45.1.el10_10:6.12.0-124.45.1.el10_1
Red Hat:enterprise_linux:10.1kernel-64k-modules-corebefore 0:6.12.0-124.45.1.el10_10:6.12.0-124.45.1.el10_1
Red Hat:enterprise_linux:10.1kernel-64k-modules-extrabefore 0:6.12.0-124.45.1.el10_10:6.12.0-124.45.1.el10_1
Red Hat:enterprise_linux:10.1kernel-abi-stablelistsbefore 0:6.12.0-124.45.1.el10_10:6.12.0-124.45.1.el10_1
Red Hat:enterprise_linux:10.1kernel-corebefore 0:6.12.0-124.45.1.el10_10:6.12.0-124.45.1.el10_1

+72

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-23005Jan 25, 2026 · x86/fpu: Clear XSTATE_BV[i] in guest XSAVE state whenever XFD[i]=1
    22Monitor
  • ← EarlierCVE-2026-23007Jan 25, 2026 · block: zero non-PI portion of auto integrity buffer
    22Monitor
  • Later →CVE-2026-23011Jan 25, 2026 · ipv4: ip_gre: make ipgre_header() robust
    22Monitor

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 Linux2684610a9c9c53f262fd864fa5c407e79f304804Vendor (CNA)
Linux Linux6.1.162Vendor (CNA)
Linux Linux6.12Vendor (CNA)
Linux Linux6.12.67Vendor (CNA)
Linux Linux6.6.122Vendor (CNA)
Linux Linux6e89d60b4f03014f7d412ce64b17a840840d490eVendor (CNA)
Linux Linux8b6dcb565e419846bd521e31d5e1f98e4d0e1179Vendor (CNA)
Linux Linux9356b69d03d0f50cce91cebdabd33dda023fbd64Vendor (CNA)
Linux Linuxddf96c393a33aef4887e2e406c76c2f8cda1419cVendor (CNA)
almalinux:kernel-abi-stablelists6.12.0-124.45.1.el10_1 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-doc6.12.0-124.45.1.el10_1 · AlmaLinux:10Package registry (OSV)
debian:linux6.1.162-1 · Debian:12Package registry (OSV)
red hat:kernel-64k-debug-debuginfo0:6.12.0-124.45.1.el10_1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:kernel-64k-debug-devel0:6.12.0-124.45.1.el10_1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:kernel-64k-debug-devel-matched0:6.12.0-124.45.1.el10_1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:kernel-64k-debuginfo0:6.12.0-124.45.1.el10_1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:kernel-64k-devel0:6.12.0-124.45.1.el10_1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:kernel-64k-devel-matched0:6.12.0-124.45.1.el10_1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:kernel-debug-debuginfo0:6.12.0-124.45.1.el10_1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:kernel-debug-devel0:6.12.0-124.45.1.el10_1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:kernel-debug-devel-matched0:6.12.0-124.45.1.el10_1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:kernel-debuginfo0:6.12.0-124.45.1.el10_1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:kernel-debuginfo-common-aarch640:6.12.0-124.45.1.el10_1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:kernel-debuginfo-common-ppc64le0:6.12.0-124.45.1.el10_1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
rocky linux:kernel0:6.12.0-124.45.1.el10_1 · Rocky Linux:10Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:02026-08-05

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.

  1. Published
  2. First PoC+191 d
  3. TodayOct 28, 2026+276 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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)

CWE-416 · Use After Free

CVSS vector

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

nvd-primary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

c
free(dev->buf);/* ... another thread is still running ... */process(dev->buf);

Fixed

c
lock(&dev->lock);free(dev->buf);dev->buf = NULL;unlock(&dev->lock);

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 (6 more)

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

All records