CVE-2022-50816

UNRATEDCVSS · not yet scored

Also known asEUVD-2022-55882 (ENISA EUVD) · GHSA-p2cq-487q-r77f (GitHub Security Advisories)Source: ENISA EUVD

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EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS v2: —Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

ipv6: ensure sane device mtu in tunnels

Another syzbot report [1] with no reproducer hints at a bug in ip6_gre tunnel (dev:ip6gretap0)

Since ipv6 mcast code makes sure to read dev->mtu once and applies a sanity check on it (see commit b9b312a7a451 "ipv6: mcast: better catch silly mtu values"), a remaining possibility is that a layer is able to set dev->mtu to an underflowed value (high order bit set).

This could happen indeed in ip6gre_tnl_link_config_route(), ip6_tnl_link_config() and ipip6_tunnel_bind_dev()

Make sure to sanitize mtu value in a local variable before it is written once on dev->mtu, as lockless readers could catch wrong temporary value.

[1] skbuff: skb_over_panic: text:ffff80000b7a2f38 len:40 put:40 head:ffff000149dcf200 data:ffff000149dcf2b0 tail:0xd8 end:0xc0 dev:ip6gretap0 ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:120 Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 10241 Comm: kworker/1:1 Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 Workqueue: mld mld_ifc_work pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : skb_panic+0x4c/0x50 net/core/skbuff.c:116 lr : skb_panic+0x4c/0x50 net/core/skbuff.c:116 sp : ffff800020dd3b60 x29: ffff800020dd3b70 x28: 0000000000000000 x27: ffff00010df2a800 x26: 00000000000000c0 x25: 00000000000000b0 x24: ffff000149dcf200 x23: 00000000000000c0 x22: 00000000000000d8 x21: ffff80000b7a2f38 x20: ffff00014c2f7800 x19: 0000000000000028 x18: 00000000000001a9 x17: 0000000000000000 x16: ffff80000db49158 x15: ffff000113bf1a80 x14: 0000000000000000 x13: 00000000ffffffff x12: ffff000113bf1a80 x11: ff808000081c0d5c x10: 0000000000000000 x9 : 73f125dc5c63ba00 x8 : 73f125dc5c63ba00 x7 : ffff800008161d1c x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0001fefddcd0 x1 : 0000000100000000 x0 : 0000000000000089 Call trace: skb_panic+0x4c/0x50 net/core/skbuff.c:116 skb_over_panic net/core/skbuff.c:125 [inline] skb_put+0xd4/0xdc net/core/skbuff.c:2049 ip6_mc_hdr net/ipv6/mcast.c:1714 [inline] mld_newpack+0x14c/0x270 net/ipv6/mcast.c:1765 add_grhead net/ipv6/mcast.c:1851 [inline] add_grec+0xa20/0xae0 net/ipv6/mcast.c:1989 mld_send_cr+0x438/0x5a8 net/ipv6/mcast.c:2115 mld_ifc_work+0x38/0x290 net/ipv6/mcast.c:2653 process_one_work+0x2d8/0x504 kernel/workqueue.c:2289 worker_thread+0x340/0x610 kernel/workqueue.c:2436 kthread+0x12c/0x158 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 Code: 91011400 aa0803e1 a90027ea 94373093 (d4210000)

CVSS v3
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EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
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EG Risk
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EPSS PROB
0.3%
EPSS %ILE
16th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

EG Severity
Not assessed: no CVSS publishedA missing CVSS is not a severity of zero.
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-26). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
No SSVC decision: EchelonGraph has not assessed this CVECISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the BOD 26-04 block below.

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” 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

December 30, 2025

Last Modified

April 15, 2026

References (7)

Vendor Advisories for CVE-2022-50816(2)

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

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatkernel-0:4.18.0-513.5.1.el8_92023-11-14redhat
redhatkernel-0:5.14.0-284.11.1.el9_22023-05-09redhat
linuxKernel @ 4.14.305 (fixes >=3.7.0)—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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
linux5.10.103-1 ... 5.10.92-2 (22 versions)
  • every version up to 5.10.158-1: fixed in 5.10.158-1
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Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.0.7-1: fixed in 6.0.7-1
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Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.0.7-1: fixed in 6.0.7-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.0.7-1: fixed in 6.0.7-1
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Data Freshness Timeline

(refreshed 6× in last 7d / 37× 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 98 of 237 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. 2 repeat rows among the latest 100 are merged into the row they repeat. The 139 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-03 16:40 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  2. 2026-11-02 16:39 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  3. 2026-11-01 16:30 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  4. 2026-10-30 16:31 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  5. 2026-10-29 16:30 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  6. 2026-10-28 16:28 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  7. 2026-10-27 16:28 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  8. 2026-10-27 10:46 UTCEG score recompute
  9. 2026-10-27 10:46 UTCVendor advisory
  10. 2026-10-27 10:46 UTCGHSA enrichmentGHSA-p2cq-487q-r77f
  11. 2026-10-26 16:28 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  12. 2026-10-25 21:55 UTCOSV refresh
  13. 2026-10-25 17:53 UTCEG score recompute
  14. 2026-10-25 16:29 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  15. 2026-10-24 16:29 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  16. 2026-10-23 16:29 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  17. 2026-10-21 16:29 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  18. 2026-10-20 16:29 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  19. 2026-10-19 16:28 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  20. 2026-10-18 16:29 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  21. 2026-10-18 08:18 UTCEG score recompute
  22. 2026-10-17 16:29 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  23. 2026-10-16 16:35 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  24. 2026-10-15 16:28 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  25. 2026-10-14 16:29 UTCEPSS rescoreEPSS 0.3% · 15th percentile
Show 73 more
  1. 2026-10-13 16:29 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  2. 2026-10-12 18:40 UTCEG score recompute
  3. 2026-10-12 16:30 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  4. 2026-10-11 22:04 UTCEG score recompute
  5. 2026-10-11 13:45 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  6. 2026-10-10 19:57 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  7. 2026-10-09 20:05 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  8. 2026-10-08 17:05 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  9. 2026-10-07 23:45 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  10. 2026-10-06 15:14 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  11. 2026-10-05 17:40 UTCEPSS rescoreEPSS 0.3% · 14th percentile
  12. 2026-10-04 23:19 UTCEPSS rescoreEPSS 0.3% · 14th percentile
  13. 2026-10-03 14:23 UTCEPSS rescoreEPSS 0.3% · 14th percentile
  14. 2026-10-03 09:09 UTCOSV refresh
  15. 2026-09-30 16:13 UTCEG score recompute
  16. 2026-09-30 15:01 UTCEPSS rescoreEPSS 0.3% · 14th percentile
  17. 2026-09-27 13:42 UTCEPSS rescoreEPSS 0.3% · 14th percentile
  18. 2026-09-26 15:55 UTCEPSS rescoreEPSS 0.3% · 14th percentile
  19. 2026-09-26 00:22 UTCEPSS rescoreEPSS 0.3% · 14th percentile
  20. 2026-09-24 14:00 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  21. 2026-09-23 13:45 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  22. 2026-09-20 20:13 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  23. 2026-09-16 14:05 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  24. 2026-09-16 05:11 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  25. 2026-09-15 03:07 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  26. 2026-09-14 04:20 UTCOSV refresh
  27. 2026-09-13 16:44 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  28. 2026-09-11 14:50 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  29. 2026-09-11 09:34 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  30. 2026-09-08 21:57 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  31. 2026-09-07 15:59 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  32. 2026-09-06 13:45 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  33. 2026-09-05 15:25 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  34. 2026-09-04 13:57 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  35. 2026-09-04 05:04 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  36. 2026-09-02 14:09 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  37. 2026-09-01 13:51 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  38. 2026-08-30 19:15 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  39. 2026-08-30 01:19 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  40. 2026-08-28 21:38 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  41. 2026-08-27 14:22 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  42. 2026-08-26 14:43 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  43. 2026-08-26 05:41 UTCOSV refresh
  44. 2026-08-25 13:46 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  45. 2026-08-23 00:17 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  46. 2026-08-21 23:46 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  47. 2026-08-20 22:53 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  48. 2026-08-19 17:01 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  49. 2026-08-18 13:45 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  50. 2026-08-17 13:44 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  51. 2026-08-16 14:53 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  52. 2026-08-16 02:12 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  53. 2026-08-15 01:27 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  54. 2026-08-13 21:58 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  55. 2026-08-12 13:48 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  56. 2026-08-09 22:26 UTCVendor advisory
  57. 2026-08-09 22:26 UTCGHSA enrichmentGHSA-p2cq-487q-r77f
  58. 2026-08-09 13:44 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  59. 2026-08-08 16:34 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  60. 2026-08-07 16:24 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  61. 2026-08-06 13:44 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  62. 2026-08-06 06:50 UTCEG score recompute
  63. 2026-08-06 06:50 UTCVendor advisory
  64. 2026-08-06 06:49 UTCGHSA enrichmentGHSA-p2cq-487q-r77f
  65. 2026-08-05 19:15 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  66. 2026-08-04 15:07 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  67. 2026-08-03 10:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  68. 2026-08-02 02:24 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  69. 2026-08-01 04:13 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  70. 2026-07-30 16:25 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  71. 2026-07-30 01:28 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  72. 2026-07-28 15:34 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  73. 2026-07-27 03:09 UTCOSV refresh

Related CVEs(same vendor)

Frequently asked(4)

What is CVE-2022-50816?
CVE-2022-50816 is a vulnerability whose severity is not yet rated; its CVE record was published on December 30, 2025. In the Linux kernel, the following vulnerability has been resolved: ipv6: ensure sane device mtu in tunnels Another syzbot report [1] with no reproducer hints at a bug in ip6_gre tunnel (dev:ip6gretap0) Since ipv6 mcast code makes sure to read dev->mtu once and applies a sanity check on it (see…
When was the CVE record for CVE-2022-50816 published?
The CVE record for CVE-2022-50816 was published on December 30, 2025. 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 April 15, 2026; the record at its source may have been updated since.
Is CVE-2022-50816 actively exploited?
CVE-2022-50816 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (16th percentile of EPSS-scored CVEs).
How do I remediate CVE-2022-50816?
A fix for CVE-2022-50816 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2022-50816 are linked in the Vendor Advisories panel on this page.

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