CVE-2021-46976

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 2024-02-28. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
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: 0.2%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

drm/i915: Fix crash in auto_retire

The retire logic uses the 2 lower bits of the pointer to the retire function to store flags. However, the auto_retire function is not guaranteed to be aligned to a multiple of 4, which causes crashes as we jump to the wrong address, for example like this:

2021-04-24T18:03:53.804300Z WARNING kernel: [ 516.876901] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI 2021-04-24T18:03:53.804310Z WARNING kernel: [ 516.876906] CPU: 7 PID: 146 Comm: kworker/u16:6 Tainted: G U 5.4.105-13595-g3cd84167b2df #1 2021-04-24T18:03:53.804311Z WARNING kernel: [ 516.876907] Hardware name: Google Volteer2/Volteer2, BIOS Google_Volteer2.13672.76.0 02/22/2021 2021-04-24T18:03:53.804312Z WARNING kernel: [ 516.876911] Workqueue: events_unbound active_work 2021-04-24T18:03:53.804313Z WARNING kernel: [ 516.876914] RIP: 0010:auto_retire+0x1/0x20 2021-04-24T18:03:53.804314Z WARNING kernel: [ 516.876916] Code: e8 01 f2 ff ff eb 02 31 db 48 89 d8 5b 5d c3 0f 1f 44 00 00 55 48 89 e5 f0 ff 87 c8 00 00 00 0f 88 ab 47 4a 00 31 c0 5d c3 0f <1f> 44 00 00 55 48 89 e5 f0 ff 8f c8 00 00 00 0f 88 9a 47 4a 00 74 2021-04-24T18:03:53.804319Z WARNING kernel: [ 516.876918] RSP: 0018:ffff9b4d809fbe38 EFLAGS: 00010286 2021-04-24T18:03:53.804320Z WARNING kernel: [ 516.876919] RAX: 0000000000000007 RBX: ffff927915079600 RCX: 0000000000000007 2021-04-24T18:03:53.804320Z WARNING kernel: [ 516.876921] RDX: ffff9b4d809fbe40 RSI: 0000000000000286 RDI: ffff927915079600 2021-04-24T18:03:53.804321Z WARNING kernel: [ 516.876922] RBP: ffff9b4d809fbe68 R08: 8080808080808080 R09: fefefefefefefeff 2021-04-24T18:03:53.804321Z WARNING kernel: [ 516.876924] R10: 0000000000000010 R11: ffffffff92e44bd8 R12: ffff9279150796a0 2021-04-24T18:03:53.804322Z WARNING kernel: [ 516.876925] R13: ffff92791c368180 R14: ffff927915079640 R15: 000000001c867605 2021-04-24T18:03:53.804323Z WARNING kernel: [ 516.876926] FS: 0000000000000000(0000) GS:ffff92791ffc0000(0000) knlGS:0000000000000000 2021-04-24T18:03:53.804323Z WARNING kernel: [ 516.876928] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 2021-04-24T18:03:53.804324Z WARNING kernel: [ 516.876929] CR2: 0000239514955000 CR3: 00000007f82da001 CR4: 0000000000760ee0 2021-04-24T18:03:53.804325Z WARNING kernel: [ 516.876930] PKRU: 55555554 2021-04-24T18:03:53.804325Z WARNING kernel: [ 516.876931] Call Trace: 2021-04-24T18:03:53.804326Z WARNING kernel: [ 516.876935] __active_retire+0x77/0xcf 2021-04-24T18:03:53.804326Z WARNING kernel: [ 516.876939] process_one_work+0x1da/0x394 2021-04-24T18:03:53.804327Z WARNING kernel: [ 516.876941] worker_thread+0x216/0x375 2021-04-24T18:03:53.804327Z WARNING kernel: [ 516.876944] kthread+0x147/0x156 2021-04-24T18:03:53.804335Z WARNING kernel: [ 516.876946] ? pr_cont_work+0x58/0x58 2021-04-24T18:03:53.804335Z WARNING kernel: [ 516.876948] ? kthread_blkcg+0x2e/0x2e 2021-04-24T18:03:53.804336Z WARNING kernel: [ 516.876950] ret_from_fork+0x1f/0x40 2021-04-24T18:03:53.804336Z WARNING kernel: [ 516.876952] Modules linked in: cdc_mbim cdc_ncm cdc_wdm xt_cgroup rfcomm cmac algif_hash algif_skcipher af_alg xt_MASQUERADE uinput snd_soc_rt5682_sdw snd_soc_rt5682 snd_soc_max98373_sdw snd_soc_max98373 snd_soc_rl6231 regmap_sdw snd_soc_sof_sdw snd_soc_hdac_hdmi snd_soc_dmic snd_hda_codec_hdmi snd_sof_pci snd_sof_intel_hda_common intel_ipu6_psys snd_sof_xtensa_dsp soundwire_intel soundwire_generic_allocation soundwire_cadence snd_sof_intel_hda snd_sof snd_soc_hdac_hda snd_soc_acpi_intel_match snd_soc_acpi snd_hda_ext_core soundwire_bus snd_hda_intel snd_intel_dspcfg snd_hda_codec snd_hwdep snd_hda_core intel_ipu6_isys videobuf2_dma_contig videobuf2_v4l2 videobuf2_common videobuf2_memops mei_hdcp intel_ipu6 ov2740 ov8856 at24 sx9310 dw9768 v4l2_fwnode cros_ec_typec intel_pmc_mux roles acpi_als typec fuse iio_trig_sysfs cros_ec_light_prox cros_ec_lid_angle cros_ec_sensors cros ---truncated---

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 impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity55% × 45%
Impact severity (EG Severity): CVSS 5.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 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
0.2%
EPSS %ILE
13th
KEV
Not listed

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

The EG score (5.5): severity, escalated by confirmed exploitation. This CVE's 5.5 is its impact severity (EG Severity), not escalated.

EG Severity
5.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). 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
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

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

February 28, 2024

Last Modified

January 10, 2025

References (4)

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 5.10.38-1: fixed in 5.10.38-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 5.10.38-1: fixed in 5.10.38-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 5.10.38-1: fixed in 5.10.38-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 5.10.38-1: fixed in 5.10.38-1
—

Data Freshness Timeline

(refreshed 8× in last 7d / 33× 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 96 of 192 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. 4 repeat rows among the latest 100 are merged into the row they repeat. The 96 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

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

Frequently asked(5)

What is CVE-2021-46976?
CVE-2021-46976 is a medium-severity vulnerability; its CVE record was published on February 28, 2024. In the Linux kernel, the following vulnerability has been resolved: drm/i915: Fix crash in auto_retire The retire logic uses the 2 lower bits of the pointer to the retire function to store flags. However, the auto_retire function is not guaranteed to be aligned to a multiple of 4, which causes…
When was the CVE record for CVE-2021-46976 published?
The CVE record for CVE-2021-46976 was published on February 28, 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 January 10, 2025; the record at its source may have been updated since.
Is CVE-2021-46976 actively exploited?
CVE-2021-46976 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (13th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2021-46976?
CVE-2021-46976 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2021-46976?
A fix for CVE-2021-46976 is available: update to the fixed version the vendor names in its advisory.

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