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NVD / CVE Program· CNA Linux

CVE-2023-52796: ipvlan: add ipvlan_route_v6_outbound() helper

HighCVSS 7.8 · v3.1—No exploit Fix available

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: 0.24% (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 03cddc4df8c6be47fd27c8f8b87e5f9a989e1458, 18f039428c7df183b09c69ebf10ffd4e521035d2, 1f64cad3ac38ac5978b53c40e6c5e6fd3477c68f.

Low priority for now. Upgrade to Linux Linux 03cddc4df8c6be47fd27c8f8b87e5f9a989e1458, 18f039428c7df183b09c69ebf10ffd4e521035d2, 1f64cad3ac38ac5978b53c40e6c5e6fd3477c68f 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: ipvlan: add ipvlan_route_v6_outbound() helper Inspired by syzbot reports using a stack of multiple ipvlan devices. Reduce stack size needed in ipvlan_process_v6_outbound() by moving the flowi6 struct used for the route lookup in an non inlined helper. ipvlan_route_v6_outbound() needs 120 bytes on the stack, immediately reclaimed. Also make sure ipvlan_process_v4_outbound() is not inlined. We might also have to lower MAX_NEST_DEV, because only syzbot uses setups with more than four stacked devices. BUG: TASK stack guard page was hit at ffffc9000e803ff8 (stack is ffffc9000e804000..ffffc9000e808000) stack guard page: 0000 [#1] SMP KASAN CPU: 0 PID: 13442 Comm: syz-executor.4 Not tainted 6.1.52-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 RIP: 0010:kasan_check_range+0x4/0x2a0 mm/kasan/generic.c:188 Code: 48 01 c6 48 89 c7 e8 db 4e c1 03 31 c0 5d c3 cc 0f 0b eb 02 0f 0b b8 ea ff ff ff 5d c3 cc 00 00 cc cc 00 00 cc cc 55 48 89 e5 <41> 57 41 56 41 55 41 54 53 b0 01 48 85 f6 0f 84 a4 01 00 00 48 89 RSP: 0018:ffffc9000e804000 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff817e5bf2 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff887c6568 RBP: ffffc9000e804000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92001d0080c R13: dffffc0000000000 R14: ffffffff87e6b100 R15: 0000000000000000 FS: 00007fd0c55826c0(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc9000e803ff8 CR3: 0000000170ef7000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <#DF> </#DF> <TASK> [<ffffffff81f281d1>] __kasan_check_read+0x11/0x20 mm/kasan/shadow.c:31 [<ffffffff817e5bf2>] instrument_atomic_read include/linux/instrumented.h:72 [inline] [<ffffffff817e5bf2>] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] [<ffffffff817e5bf2>] cpumask_test_cpu include/linux/cpumask.h:506 [inline] [<ffffffff817e5bf2>] cpu_online include/linux/cpumask.h:1092 [inline] [<ffffffff817e5bf2>] trace_lock_acquire include/trace/events/lock.h:24 [inline] [<ffffffff817e5bf2>] lock_acquire+0xe2/0x590 kernel/locking/lockdep.c:5632 [<ffffffff8563221e>] rcu_lock_acquire+0x2e/0x40 include/linux/rcupdate.h:306 [<ffffffff8561464d>] rcu_read_lock include/linux/rcupdate.h:747 [inline] [<ffffffff8561464d>] ip6_pol_route+0x15d/0x1440 net/ipv6/route.c:2221 [<ffffffff85618120>] ip6_pol_route_output+0x50/0x80 net/ipv6/route.c:2606 [<ffffffff856f65b5>] pol_lookup_func include/net/ip6_fib.h:584 [inline] [<ffffffff856f65b5>] fib6_rule_lookup+0x265/0x620 net/ipv6/fib6_rules.c:116 [<ffffffff85618009>] ip6_route_output_flags_noref+0x2d9/0x3a0 net/ipv6/route.c:2638 [<ffffffff8561821a>] ip6_route_output_flags+0xca/0x340 net/ipv6/route.c:2651 [<ffffffff838bd5a3>] ip6_route_output include/net/ip6_route.h:100 [inline] [<ffffffff838bd5a3>] ipvlan_process_v6_outbound drivers/net/ipvlan/ipvlan_core.c:473 [inline] [<ffffffff838bd5a3>] ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:529 [inline] [<ffffffff838bd5a3>] ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:602 [inline] [<ffffffff838bd5a3>] ipvlan_queue_xmit+0xc33/0x1be0 drivers/net/ipvlan/ipvlan_core.c:677 [<ffffffff838c2909>] ipvlan_start_xmit+0x49/0x100 drivers/net/ipvlan/ipvlan_main.c:229 [<ffffffff84d03900>] netdev_start_xmit include/linux/netdevice.h:4966 [inline] [<ffffffff84d03900>] xmit_one net/core/dev.c:3644 [inline] [<ffffffff84d03900>] dev_hard_start_xmit+0x320/0x980 net/core/dev.c:3660 [<ffffffff84d080e2>] __dev_queue_xmit+0x16b2/0x3370 net/core/dev.c:4324 [<ffffffff855ce4cd>] dev_queue_xmit include/linux/netdevice.h:3067 [inline] [<ffffffff855ce4cd>] neigh_hh_output include/net/neighbour.h:529 [inline] [<f ---truncated---

Published
May 21, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 16th 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%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • 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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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

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

    • 3.19affected
    • 5.15.140 and later · up to and including 5.15.*not affected · semver
    • 2ad7bf3638411cb547f2823df08166c13ab04269 and later · before 4f7f850611aa27aaaf1bf5687702ad2240ae442aaffected · git
    • 2ad7bf3638411cb547f2823df08166c13ab04269 and later · before 4d2d30f0792b47908af64c4d02ed1ee25ff50542affected · git
    • 2ad7bf3638411cb547f2823df08166c13ab04269 and later · before 43b781e7cb5cd0b435de276111953bf2bacd1f02affected · git
    • 2ad7bf3638411cb547f2823df08166c13ab04269 and later · before 1f64cad3ac38ac5978b53c40e6c5e6fd3477c68faffected · git
    • 2ad7bf3638411cb547f2823df08166c13ab04269 and later · before 732a67ca436887b594ebc43bb5a04ffb0971a760affected · git
    • 2ad7bf3638411cb547f2823df08166c13ab04269 and later · before 8872dc638c24bb774cd2224a69d72a7f661a4d56affected · git
    • 2ad7bf3638411cb547f2823df08166c13ab04269 and later · before 03cddc4df8c6be47fd27c8f8b87e5f9a989e1458affected · git
    • 2ad7bf3638411cb547f2823df08166c13ab04269 and later · before 18f039428c7df183b09c69ebf10ffd4e521035d2affected · git
Affected versions · NVD (8)

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

  • linux linux kernel3.19 and later · before 4.19.300
  • linux linux kernel4.20 and later · before 5.4.262
  • linux linux kernel5.5 and later · before 5.10.202
  • linux linux kernel5.11 and later · before 5.15.140
  • linux linux kernel5.16 and later · before 6.1.64
  • linux linux kernel6.2 and later · before 6.5.13
  • linux linux kernel6.6 and later · before 6.6.3
  • linux linux kernel6.7

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.64-16.1.64-1
Debian:13linuxbefore 6.6.8-16.6.8-1
Red Hat:enterprise_linux:9::appstreambpftool-debuginfobefore 0:7.3.0-427.31.1.el9_40:7.3.0-427.31.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-64k-debug-debuginfobefore 0:5.14.0-427.31.1.el9_40:5.14.0-427.31.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-64k-debug-develbefore 0:5.14.0-427.31.1.el9_40:5.14.0-427.31.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-64k-debug-devel-matchedbefore 0:5.14.0-427.31.1.el9_40:5.14.0-427.31.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-64k-debuginfobefore 0:5.14.0-427.31.1.el9_40:5.14.0-427.31.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-64k-develbefore 0:5.14.0-427.31.1.el9_40:5.14.0-427.31.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-64k-devel-matchedbefore 0:5.14.0-427.31.1.el9_40:5.14.0-427.31.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-debug-debuginfobefore 0:5.14.0-427.31.1.el9_40:5.14.0-427.31.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-debug-develbefore 0:5.14.0-427.31.1.el9_40:5.14.0-427.31.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-debug-devel-matchedbefore 0:5.14.0-427.31.1.el9_40:5.14.0-427.31.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-debuginfobefore 0:5.14.0-427.31.1.el9_40:5.14.0-427.31.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-debuginfo-common-aarch64before 0:5.14.0-427.31.1.el9_40:5.14.0-427.31.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-debuginfo-common-ppc64lebefore 0:5.14.0-427.31.1.el9_40:5.14.0-427.31.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-debuginfo-common-s390xbefore 0:5.14.0-427.31.1.el9_40:5.14.0-427.31.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-debuginfo-common-x86_64before 0:5.14.0-427.31.1.el9_40:5.14.0-427.31.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-develbefore 0:5.14.0-427.31.1.el9_40:5.14.0-427.31.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-devel-matchedbefore 0:5.14.0-427.31.1.el9_40:5.14.0-427.31.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-docbefore 0:5.14.0-427.31.1.el9_40:5.14.0-427.31.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-rt-debug-debuginfobefore 0:5.14.0-427.31.1.el9_40:5.14.0-427.31.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-rt-debuginfobefore 0:5.14.0-427.31.1.el9_40:5.14.0-427.31.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-tools-debuginfobefore 0:5.14.0-427.31.1.el9_40:5.14.0-427.31.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-zfcpdump-debuginfobefore 0:5.14.0-427.31.1.el9_40:5.14.0-427.31.1.el9_4

+56

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-2023-52794May 21, 2024 · thermal: intel: powerclamp: fix mismatch in get function for max_idle
    28Monitor
  • ← EarlierCVE-2023-52795May 21, 2024 · vhost-vdpa: fix use after free in vhost_vdpa_probe()
    31Monitor
  • Later →CVE-2023-52797May 21, 2024 · drivers: perf: Check find_first_bit() return value
    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 Linux03cddc4df8c6be47fd27c8f8b87e5f9a989e1458Vendor (CNA)
Linux Linux18f039428c7df183b09c69ebf10ffd4e521035d2Vendor (CNA)
Linux Linux1f64cad3ac38ac5978b53c40e6c5e6fd3477c68fVendor (CNA)
Linux Linux43b781e7cb5cd0b435de276111953bf2bacd1f02Vendor (CNA)
Linux Linux4d2d30f0792b47908af64c4d02ed1ee25ff50542Vendor (CNA)
Linux Linux4f7f850611aa27aaaf1bf5687702ad2240ae442aVendor (CNA)
Linux Linux732a67ca436887b594ebc43bb5a04ffb0971a760Vendor (CNA)
Linux Linux8872dc638c24bb774cd2224a69d72a7f661a4d56Vendor (CNA)
debian:linux6.1.64-1 · Debian:12Package registry (OSV)
red hat:bpftool-debuginfo0:7.3.0-427.31.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-debuginfo0:5.14.0-427.31.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel0:5.14.0-427.31.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel-matched0:5.14.0-427.31.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debuginfo0:5.14.0-427.31.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel0:5.14.0-427.31.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel-matched0:5.14.0-427.31.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-427.31.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel0:5.14.0-427.31.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel-matched0:5.14.0-427.31.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debuginfo0:5.14.0-427.31.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-aarch640:5.14.0-427.31.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage 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.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

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-787 · Out-of-bounds Write

CVSS vector

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

nvd-primary

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.

References

Show all references (7 more)

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

All records