CVE-2022-49058

HIGHNVD 7.87.8
EchelonGraph scoreMEDIUM confidence

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

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2025-03-18. NVD baseline CVSS 7.8; 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

Also known asEUVD-2022-55146 (ENISA EUVD) · GHSA-8x6x-mcww-82p3 (GitHub Security Advisories)Source: ENISA EUVD

7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.9%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

cifs: potential buffer overflow in handling symlinks

Smatch printed a warning: arch/x86/crypto/poly1305_glue.c:198 poly1305_update_arch() error: __memcpy() 'dctx->buf' too small (16 vs u32max)

It's caused because Smatch marks 'link_len' as untrusted since it comes from sscanf(). Add a check to ensure that 'link_len' is not larger than the size of the 'link_str' buffer.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

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)
Severity78% × 45%
Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.9% × 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 low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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
0.9%
EPSS %ILE
58th
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 (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.

EG Severity
7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.9% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-28). 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 low or medium mission impact; Track* at high (mission-essential systems).CISA 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 SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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)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 Vulnrichment) · Technical impact total (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 26, 2025

Last Modified

August 5, 2026

Advisory Details (8)

Auto-updated Aug 4, 2026
Patch available.
Web page

cifs: potential buffer overflow in handling symlinks - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/eb5f51756944735ac70cd8bb38637cc202e29c91
Web page

cifs: potential buffer overflow in handling symlinks - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9901b07ba42b39266b34a888e48d7306fd707bee
Web page

cifs: potential buffer overflow in handling symlinks - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/64c4a37ac04eeb43c42d272f6e6c8c12bfcf4304
Web page

cifs: potential buffer overflow in handling symlinks - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/515e7ba11ef043d6febe69389949c8ef5f25e9d0
Web page

cifs: potential buffer overflow in handling symlinks - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4e166a41180be2f1e66bbb6d46448e80a9a5ec05
Web page

cifs: potential buffer overflow in handling symlinks - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3e582749e742e662a8e9bb37cffac62dccaaa1e2
Web page

cifs: potential buffer overflow in handling symlinks - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/22d658c6c5affed10c8907e67160cef0b6c92186
Web page

cifs: potential buffer overflow in handling symlinks - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1316c28569a80ab3596eeab05bf5e01991e7e739

Patch Availability(10)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatkernel-0:5.14.0-70.141.1.el9_02025-08-05redhat
redhatkernel-0:4.18.0-477.104.1.el8_82025-08-05redhat
redhatkernel-rt-0:5.14.0-70.141.1.rt21.213.el9_02025-08-05redhat
redhatkernel-0:4.18.0-193.162.1.el8_22025-08-04redhat
redhatkernel-0:4.18.0-305.165.1.el8_42025-07-30redhat
redhatkernel-0:4.18.0-372.153.1.el8_62025-07-23redhat
redhatkernel-rt-0:4.18.0-553.62.1.rt7.403.el8_102025-07-16redhat
redhatkernel-0:4.18.0-553.62.1.el8_102025-07-16redhat
redhatkernel-0:5.14.0-284.11.1.el9_22023-05-09redhat
linuxKernel @ 4.9.311 (fixes >=2.6.37)—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 (11 versions)
  • every version up to 5.10.113-1: fixed in 5.10.113-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 5.17.6-1: fixed in 5.17.6-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 5.17.6-1: fixed in 5.17.6-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 5.17.6-1: fixed in 5.17.6-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 40× 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 99 of 207 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 108 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-31 16:29 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  2. 2026-10-30 16:31 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  3. 2026-10-29 16:30 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  4. 2026-10-28 23:48 UTCEG score recompute
  5. 2026-10-28 23:48 UTCVendor advisory
  6. 2026-10-28 23:48 UTCGHSA enrichmentGHSA-8x6x-mcww-82p3 · GitHub severity HIGH · GitHub CVSS 7.8
  7. 2026-10-28 16:28 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  8. 2026-10-27 16:28 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  9. 2026-10-26 16:28 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  10. 2026-10-25 17:55 UTCEG score recompute
  11. 2026-10-25 16:29 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  12. 2026-10-24 16:29 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  13. 2026-10-23 16:29 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  14. 2026-10-22 16:30 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  15. 2026-10-21 16:29 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  16. 2026-10-21 05:36 UTCEG score recompute
  17. 2026-10-21 05:36 UTCVendor advisory
  18. 2026-10-21 05:36 UTCGHSA enrichmentGHSA-8x6x-mcww-82p3 · GitHub severity HIGH · GitHub CVSS 7.8
  19. 2026-10-20 16:29 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  20. 2026-10-19 16:28 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  21. 2026-10-19 12:25 UTCOSV refresh
  22. 2026-10-18 16:29 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  23. 2026-10-18 08:20 UTCEG score recompute
  24. 2026-10-17 16:29 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  25. 2026-10-16 16:35 UTCEPSS rescoreEPSS 0.9% · 58th percentile
Show 74 more
  1. 2026-10-15 16:28 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  2. 2026-10-14 16:29 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  3. 2026-10-13 16:29 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  4. 2026-10-12 18:42 UTCEG score recompute
  5. 2026-10-12 16:30 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  6. 2026-10-11 22:05 UTCEG score recompute
  7. 2026-10-11 13:45 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  8. 2026-10-10 19:57 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  9. 2026-10-09 20:05 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  10. 2026-10-08 17:05 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  11. 2026-10-07 23:45 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  12. 2026-10-06 15:14 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  13. 2026-10-05 17:40 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  14. 2026-10-04 23:19 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  15. 2026-10-03 14:23 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  16. 2026-09-30 16:12 UTCEG score recompute
  17. 2026-09-30 15:01 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  18. 2026-09-27 13:42 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  19. 2026-09-26 19:33 UTCOSV refresh
  20. 2026-09-26 15:55 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  21. 2026-09-26 00:22 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  22. 2026-09-24 14:00 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  23. 2026-09-23 13:45 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  24. 2026-09-20 20:13 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  25. 2026-09-16 14:05 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  26. 2026-09-16 05:11 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  27. 2026-09-15 03:07 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  28. 2026-09-13 16:44 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  29. 2026-09-11 14:50 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  30. 2026-09-11 09:34 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  31. 2026-09-08 21:57 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  32. 2026-09-07 15:59 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  33. 2026-09-07 04:48 UTCOSV refresh
  34. 2026-09-06 13:45 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  35. 2026-09-05 15:25 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  36. 2026-09-04 13:57 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  37. 2026-09-04 05:04 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  38. 2026-09-02 14:09 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  39. 2026-09-01 13:51 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  40. 2026-08-30 19:15 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  41. 2026-08-30 01:19 UTCEPSS rescoreEPSS 0.9% · 55th percentile
  42. 2026-08-28 21:38 UTCEPSS rescoreEPSS 0.9% · 55th percentile
  43. 2026-08-27 14:22 UTCEPSS rescoreEPSS 0.9% · 55th percentile
  44. 2026-08-26 14:43 UTCEPSS rescoreEPSS 0.9% · 55th percentile
  45. 2026-08-25 13:46 UTCEPSS rescoreEPSS 0.9% · 55th percentile
  46. 2026-08-23 00:17 UTCEPSS rescoreEPSS 0.9% · 55th percentile
  47. 2026-08-21 23:46 UTCEPSS rescoreEPSS 0.9% · 55th percentile
  48. 2026-08-20 22:53 UTCEPSS rescoreEPSS 0.9% · 55th percentile
  49. 2026-08-20 14:31 UTCOSV refresh
  50. 2026-08-19 17:01 UTCEPSS rescoreEPSS 0.9% · 55th percentile
  51. 2026-08-18 13:45 UTCEPSS rescoreEPSS 0.9% · 55th percentile
  52. 2026-08-17 13:44 UTCEPSS rescoreEPSS 0.9% · 55th percentile
  53. 2026-08-16 14:53 UTCEPSS rescoreEPSS 0.9% · 55th percentile
  54. 2026-08-16 02:12 UTCEPSS rescoreEPSS 0.9% · 55th percentile
  55. 2026-08-15 01:27 UTCEPSS rescoreEPSS 0.9% · 55th percentile
  56. 2026-08-13 21:58 UTCEPSS rescoreEPSS 0.9% · 55th percentile
  57. 2026-08-12 13:48 UTCEPSS rescoreEPSS 0.9% · 55th percentile
  58. 2026-08-09 13:44 UTCEPSS rescoreEPSS 0.9% · 55th percentile
  59. 2026-08-08 16:34 UTCEPSS rescoreEPSS 0.9% · 55th percentile
  60. 2026-08-07 16:24 UTCEPSS rescoreEPSS 0.9% · 55th percentile
  61. 2026-08-06 13:44 UTCEPSS rescoreEPSS 0.9% · 55th percentile
  62. 2026-08-05 19:15 UTCEPSS rescoreEPSS 0.9% · 55th percentile
  63. 2026-08-05 09:35 UTCEG score recompute
  64. 2026-08-05 09:35 UTCVendor advisory
  65. 2026-08-05 09:35 UTCGHSA enrichmentGHSA-8x6x-mcww-82p3 · GitHub severity HIGH · GitHub CVSS 7.8
  66. 2026-08-04 15:07 UTCEPSS rescoreEPSS 0.9% · 55th percentile
  67. 2026-08-04 11:17 UTCEG score recompute
  68. 2026-08-04 11:17 UTCVendor advisory
  69. 2026-08-04 11:17 UTCGHSA enrichmentGHSA-8x6x-mcww-82p3 · GitHub severity HIGH · GitHub CVSS 7.8
  70. 2026-08-04 10:35 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  71. 2026-08-04 09:47 UTCEG score recompute
  72. 2026-08-04 09:47 UTCVendor advisory
  73. 2026-08-04 09:47 UTCGHSA enrichmentGHSA-8x6x-mcww-82p3 · GitHub severity HIGH · GitHub CVSS 7.8
  74. 2026-08-03 10:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile

Frequently asked(5)

What is CVE-2022-49058?
CVE-2022-49058 is a high-severity vulnerability; its CVE record was published on February 26, 2025. In the Linux kernel, the following vulnerability has been resolved: cifs: potential buffer overflow in handling symlinks Smatch printed a warning: arch/x86/crypto/poly1305_glue.c:198 poly1305_update_arch() error: __memcpy() 'dctx->buf' too small (16 vs u32max) It's caused because Smatch marks…
When was the CVE record for CVE-2022-49058 published?
The CVE record for CVE-2022-49058 was published on February 26, 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 August 5, 2026; the record at its source may have been updated since.
Is CVE-2022-49058 actively exploited?
CVE-2022-49058 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.9% probability of exploitation in the next 30 days (58th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2022-49058?
CVE-2022-49058 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2022-49058?
A fix for CVE-2022-49058 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2022-49058 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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