CVE-2024-33621

MEDIUMNVD 5.55.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 5.5 from GitHub Security Advisory published 2024-06-21. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this week
5.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

ipvlan: Dont Use skb->sk in ipvlan_process_v{4,6}_outbound

Raw packet from PF_PACKET socket ontop of an IPv6-backed ipvlan device will hit WARN_ON_ONCE() in sk_mc_loop() through sch_direct_xmit() path.

WARNING: CPU: 2 PID: 0 at net/core/sock.c:775 sk_mc_loop+0x2d/0x70 Modules linked in: sch_netem ipvlan rfkill cirrus drm_shmem_helper sg drm_kms_helper CPU: 2 PID: 0 Comm: swapper/2 Kdump: loaded Not tainted 6.9.0+ #279 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 RIP: 0010:sk_mc_loop+0x2d/0x70 Code: fa 0f 1f 44 00 00 65 0f b7 15 f7 96 a3 4f 31 c0 66 85 d2 75 26 48 85 ff 74 1c RSP: 0018:ffffa9584015cd78 EFLAGS: 00010212 RAX: 0000000000000011 RBX: ffff91e585793e00 RCX: 0000000002c6a001 RDX: 0000000000000000 RSI: 0000000000000040 RDI: ffff91e589c0f000 RBP: ffff91e5855bd100 R08: 0000000000000000 R09: 3d00545216f43d00 R10: ffff91e584fdcc50 R11: 00000060dd8616f4 R12: ffff91e58132d000 R13: ffff91e584fdcc68 R14: ffff91e5869ce800 R15: ffff91e589c0f000 FS: 0000000000000000(0000) GS:ffff91e898100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f788f7c44c0 CR3: 0000000008e1a000 CR4: 00000000000006f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace:

? __warn (kernel/panic.c:693) ? sk_mc_loop (net/core/sock.c:760) ? report_bug (lib/bug.c:201 lib/bug.c:219) ? handle_bug (arch/x86/kernel/traps.c:239) ? exc_invalid_op (arch/x86/kernel/traps.c:260 (discriminator 1)) ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) ? sk_mc_loop (net/core/sock.c:760) ip6_finish_output2 (net/ipv6/ip6_output.c:83 (discriminator 1)) ? nf_hook_slow (net/netfilter/core.c:626) ip6_finish_output (net/ipv6/ip6_output.c:222) ? __pfx_ip6_finish_output (net/ipv6/ip6_output.c:215) ipvlan_xmit_mode_l3 (drivers/net/ipvlan/ipvlan_core.c:602) ipvlan ipvlan_start_xmit (drivers/net/ipvlan/ipvlan_main.c:226) ipvlan dev_hard_start_xmit (net/core/dev.c:3594) sch_direct_xmit (net/sched/sch_generic.c:343) __qdisc_run (net/sched/sch_generic.c:416) net_tx_action (net/core/dev.c:5286) handle_softirqs (kernel/softirq.c:555) __irq_exit_rcu (kernel/softirq.c:589) sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043)

The warning triggers as this: packet_sendmsg packet_snd //skb->sk is packet sk __dev_queue_xmit __dev_xmit_skb //q->enqueue is not NULL __qdisc_run sch_direct_xmit dev_hard_start_xmit ipvlan_start_xmit ipvlan_xmit_mode_l3 //l3 mode ipvlan_process_outbound //vepa flag ipvlan_process_v6_outbound ip6_local_out __ip6_finish_output ip6_finish_output2 //multicast packet sk_mc_loop //sk->sk_family is AF_PACKET

Call ip{6}_local_out() with NULL sk in ipvlan as other tunnels to fix this.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed (value × EchelonGraph’s weight)
Severity55% × 45%
The EG Score, 5.5 of 10.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
17th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

June 21, 2024

Last Modified

October 15, 2026

References (12)

Vendor Advisories for CVE-2024-33621(7)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(27)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-tools-raspi-hwe-18.04-edge (5.4.0.1114.126~18.04.1) @ bionic2026-05-22ubuntu
ubuntulinux-tools-azure (6.8.0-1014.16) @ noble2026-05-22ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.121.121) @ jammy2026-05-22ubuntu
ubuntulinux-tools-nvidia-hwe-22.04-edge (6.8.0-1013.14~22.04.1) @ jammy2026-05-22ubuntu
ubuntulinux-tools-raspi (6.8.0-1011.12) @ noble2026-05-22ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-45.45~22.04.1) @ jammy2026-05-22ubuntu
ubuntulinux-tools-azure-edge (5.15.0.1072.81~20.04.1) @ focal2026-05-22ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1067.73~20.04.1) @ focal2026-05-22ubuntu
ubuntulinux-tools-azure-fde-edge (5.15.0.1072.81~20.04.1.49) @ focal2026-05-22ubuntu
ubuntulinux-tools-lowlatency-hwe-22.04-edge (6.8.0-44.44.1~22.04.1) @ jammy2026-05-22ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k (6.8.0-1013.14.1) @ noble2026-05-22ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (5.15.0.121.110) @ jammy2026-05-22ubuntu
ubuntulinux-xilinx-zynqmp-tools-host (5.15.0-1035.39) @ jammy2026-05-22ubuntu
ubuntulinux-tools-oracle-edge (5.4.0.1129.138~18.04.1) @ bionic2026-05-22ubuntu
ubuntulinux-virtual-hwe-18.04-edge (5.4.0.192.212~18.04.1) @ bionic2026-05-22ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.8.0-44.44) @ noble2026-05-22ubuntu
ubuntulinux-tools-azure-lts-20.04 (5.4.0.1135.129) @ focal2026-05-22ubuntu
ubuntulinux-tools-bluefield (5.4.0.1090.86) @ focal2026-05-22ubuntu
ubuntulinux-tools-azure-edge (5.4.0.1135.142~18.04.1) @ bionic2026-05-22ubuntu
redhatkernel-0:4.18.0-477.70.1.el8_82024-09-03redhat
redhatkernel-0:5.14.0-427.31.1.el9_42024-08-15redhat
redhatkernel-0:4.18.0-553.16.1.el8_102024-08-08redhat
redhatkernel-rt-0:4.18.0-553.16.1.rt7.357.el8_102024-08-08redhat
redhatkernel-rt-0:5.14.0-284.77.1.rt14.362.el9_22024-08-07redhat
redhatkernel-0:5.14.0-284.77.1.el9_22024-08-07redhat
redhatkernel-0:4.18.0-372.115.1.el8_62024-08-07redhat
linuxKernel @ 4.19.316 (fixes >=3.19.0)—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 5 ecosystems)
Debian:10(1)
PackageVulnerable rangeFix by version rangeDependents
linux4.19.118-1 ... 4.19.98-1~bpo9+1 (46 versions)
  • every version up to 4.19.316-1: fixed in 4.19.316-1
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
linux5.10.103-1 ... 5.10.92-2 (41 versions)
  • every version up to 5.10.221-1: fixed in 5.10.221-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.27-1 ... 6.1.94-1~bpo11+1 (23 versions)
  • every version up to 6.1.94-1: fixed in 6.1.94-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.9.7-1: fixed in 6.9.7-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.9.7-1: fixed in 6.9.7-1
—

Additional Vendor Advisories

(18)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 13× in last 7d / 36× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 91 of 213 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 9 repeat rows among the latest 100 are merged into the row they repeat. The 122 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-15 01:19 UTCEG score recompute
  2. 2026-10-15 01:19 UTCVendor advisory
  3. 2026-10-15 01:18 UTCGHSA enrichmentGHSA-7qww-h2vg-jf7c · GitHub CVSS 5.5
  4. 2026-10-14 16:30 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  5. 2026-10-13 16:30 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  6. 2026-10-12 17:54 UTCEG score recompute
  7. 2026-10-12 16:31 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  8. 2026-10-11 21:19 UTCEG score recompute
  9. 2026-10-11 16:12 UTCEG score recompute
  10. 2026-10-11 13:46 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  11. 2026-10-10 19:58 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  12. 2026-10-09 20:05 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  13. 2026-10-08 17:07 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  14. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  15. 2026-10-07 10:54 UTCOSV refresh
  16. 2026-10-06 15:15 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  17. 2026-10-05 17:41 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  18. 2026-10-04 23:20 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  19. 2026-10-03 14:24 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  20. 2026-10-01 19:48 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  21. 2026-09-30 19:44 UTCEG score recompute
  22. 2026-09-30 15:01 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  23. 2026-09-29 15:17 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  24. 2026-09-28 13:49 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  25. 2026-09-27 13:44 UTCEPSS rescoreEPSS 0.3% · 16th percentile
Show 66 more
  1. 2026-09-26 15:57 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  2. 2026-09-26 00:23 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  3. 2026-09-24 14:01 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  4. 2026-09-23 13:46 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  5. 2026-09-22 14:46 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  6. 2026-09-21 20:32 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  7. 2026-09-20 20:14 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  8. 2026-09-19 15:40 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  9. 2026-09-18 19:26 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  10. 2026-09-17 17:06 UTCOSV refresh
  11. 2026-09-16 14:06 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  12. 2026-09-15 03:08 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  13. 2026-09-13 16:45 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  14. 2026-09-12 14:59 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  15. 2026-09-11 14:51 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  16. 2026-09-11 09:35 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  17. 2026-09-08 21:58 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  18. 2026-09-07 15:59 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  19. 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  20. 2026-09-05 15:26 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  21. 2026-09-04 13:58 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  22. 2026-09-04 05:05 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  23. 2026-09-02 14:10 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  24. 2026-09-01 13:52 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  25. 2026-08-30 19:15 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  26. 2026-08-30 01:20 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  27. 2026-08-29 17:13 UTCOSV refresh
  28. 2026-08-28 21:39 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  29. 2026-08-27 14:23 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  30. 2026-08-26 14:44 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  31. 2026-08-25 13:47 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  32. 2026-08-24 14:15 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  33. 2026-08-23 00:17 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  34. 2026-08-21 23:47 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  35. 2026-08-20 22:53 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  36. 2026-08-19 17:02 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  37. 2026-08-18 13:46 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  38. 2026-08-17 13:45 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  39. 2026-08-16 14:54 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  40. 2026-08-16 02:13 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  41. 2026-08-15 01:28 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  42. 2026-08-13 21:59 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  43. 2026-08-13 04:30 UTCOSV refresh
  44. 2026-08-12 13:49 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  45. 2026-08-11 13:40 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  46. 2026-08-10 23:58 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  47. 2026-08-09 13:45 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  48. 2026-08-08 16:35 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  49. 2026-08-07 16:25 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  50. 2026-08-06 13:45 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  51. 2026-08-05 19:16 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  52. 2026-08-04 15:08 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  53. 2026-08-04 10:36 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  54. 2026-08-03 10:34 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  55. 2026-08-02 02:25 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  56. 2026-08-01 04:14 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  57. 2026-07-30 16:26 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  58. 2026-07-30 01:29 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  59. 2026-07-28 15:34 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  60. 2026-07-28 12:20 UTCOSV refresh
  61. 2026-07-27 14:11 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  62. 2026-07-26 14:53 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  63. 2026-07-25 14:16 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  64. 2026-07-24 14:16 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  65. 2026-07-23 14:17 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  66. 2026-07-23 02:37 UTCEG score recompute

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2024-33621?
CVE-2024-33621 is a medium-severity vulnerability; its CVE record was published on June 21, 2024. In the Linux kernel, the following vulnerability has been resolved: ipvlan: Dont Use skb->sk in ipvlanprocessv{4,6}_outbound Raw packet from PF_PACKET socket ontop of an IPv6-backed ipvlan device will hit WARNONONCE() in skmcloop() through schdirectxmit() path. WARNING: CPU: 2 PID: 0 at…
When was the CVE record for CVE-2024-33621 published?
The CVE record for CVE-2024-33621 was published on June 21, 2024. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 15, 2026; the record at its source may have been updated since.
Is CVE-2024-33621 actively exploited?
CVE-2024-33621 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (17th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2024-33621?
CVE-2024-33621 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2024-33621?
A fix for CVE-2024-33621 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2024-33621 are linked in the Vendor Advisories panel on this page.

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