CVE-2022-48674

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2024-05-03. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

erofs: fix pcluster use-after-free on UP platforms

During stress testing with CONFIG_SMP disabled, KASAN reports as below:

================================================================== BUG: KASAN: use-after-free in __mutex_lock+0xe5/0xc30 Read of size 8 at addr ffff8881094223f8 by task stress/7789

CPU: 0 PID: 7789 Comm: stress Not tainted 6.0.0-rc1-00002-g0d53d2e882f9 #3 Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 Call Trace: .. __mutex_lock+0xe5/0xc30 .. z_erofs_do_read_page+0x8ce/0x1560 .. z_erofs_readahead+0x31c/0x580 .. Freed by task 7787 kasan_save_stack+0x1e/0x40 kasan_set_track+0x20/0x30 kasan_set_free_info+0x20/0x40 __kasan_slab_free+0x10c/0x190 kmem_cache_free+0xed/0x380 rcu_core+0x3d5/0xc90 __do_softirq+0x12d/0x389

Last potentially related work creation: kasan_save_stack+0x1e/0x40 __kasan_record_aux_stack+0x97/0xb0 call_rcu+0x3d/0x3f0 erofs_shrink_workstation+0x11f/0x210 erofs_shrink_scan+0xdc/0x170 shrink_slab.constprop.0+0x296/0x530 drop_slab+0x1c/0x70 drop_caches_sysctl_handler+0x70/0x80 proc_sys_call_handler+0x20a/0x2f0 vfs_write+0x555/0x6c0 ksys_write+0xbe/0x160 do_syscall_64+0x3b/0x90

The root cause is that erofs_workgroup_unfreeze() doesn't reset to orig_val thus it causes a race that the pcluster reuses unexpectedly before freeing.

Since UP platforms are quite rare now, such path becomes unnecessary. Let's drop such specific-designed path directly instead.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: Track

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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
14%
KEV
Not listed

Published

May 3, 2024

Last Modified

August 5, 2026

Advisory Details (3)

Auto-updated Aug 4, 2026
No patch confirmed yet.
generic

erofs: fix pcluster use-after-free on UP platforms - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/94c34faaafe7b55adc2d8d881db195b646959b9e
generic

erofs: fix pcluster use-after-free on UP platforms - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8ddd001cef5e82d19192e6861068463ecca5f556
generic

erofs: fix pcluster use-after-free on UP platforms - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2f44013e39984c127c6efedf70e6b5f4e9dcf315

Patch Availability(7)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-xilinx-zynqmp-tools-5.4.0-1049 (5.4.0-1049.53) @ focal2026-05-24ubuntu
ubuntulinux-tools-oracle-lts-20.04 (5.4.0.1129.122) @ focal2026-05-24ubuntu
ubuntulinux-tools-azure-lts-20.04 (5.4.0.1135.129) @ focal2026-05-24ubuntu
ubuntulinux-tools-azure-edge (5.4.0.1135.142~18.04.1) @ bionic2026-05-24ubuntu
ubuntulinux-tools-bluefield (5.4.0.1090.86) @ focal2026-05-24ubuntu
ubuntulinux-tools-raspi-hwe-18.04-edge (5.4.0.1114.126~18.04.1) @ bionic2026-05-24ubuntu
linuxKernel @ 5.15.68—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.

Weakness Classification(1)

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

All Vendor Advisories

(6)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 14× in last 7d / 52× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 130 total refreshes for this CVE.

  1. 2026-08-07 16:24 UTCEPSS rescore
  2. 2026-08-06 13:44 UTCEPSS rescore
  3. 2026-08-05 19:15 UTCEPSS rescore
  4. 2026-08-05 09:42 UTCEG score recompute
  5. 2026-08-05 09:42 UTCGHSA enrichment
  6. 2026-08-04 15:07 UTCEPSS rescore
  7. 2026-08-04 12:15 UTCEG score recompute
  8. 2026-08-04 12:15 UTCGHSA enrichment
  9. 2026-08-04 10:35 UTCEPSS rescore
  10. 2026-08-04 09:52 UTCEG score recompute
  11. 2026-08-04 09:52 UTCVendor advisory
  12. 2026-08-04 09:52 UTCGHSA enrichment
  13. 2026-08-03 10:33 UTCEPSS rescore
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  15. 2026-08-01 04:36 UTCOSV refresh
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  1. 2026-07-23 02:16 UTCEG score recompute
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  3. 2026-07-22 14:06 UTCEPSS rescore
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  19. 2026-07-14 11:55 UTCOSV refresh
  20. 2026-07-13 22:28 UTCEPSS rescore
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  24. 2026-07-12 05:44 UTCEPSS rescore
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  27. 2026-07-09 19:08 UTCEPSS rescore
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  43. 2026-06-26 12:37 UTCOSV refresh
  44. 2026-06-25 13:48 UTCEPSS rescore
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  72. 2026-06-08 19:11 UTCOSV refresh
  73. 2026-06-08 14:15 UTCEPSS rescore
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  75. 2026-06-07 15:23 UTCEPSS rescore

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2022-48674?
CVE-2022-48674 is a high vulnerability published on May 3, 2024. In the Linux kernel, the following vulnerability has been resolved: erofs: fix pcluster use-after-free on UP platforms During stress testing with CONFIG_SMP disabled, KASAN reports as below: ================================================================== BUG: KASAN: use-after-free in…
When was CVE-2022-48674 disclosed?
CVE-2022-48674 was first published in the National Vulnerability Database on May 3, 2024, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-48674 actively exploited?
CVE-2022-48674 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 85.9% of all scored CVEs.
What is the CVSS score of CVE-2022-48674?
CVE-2022-48674 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2022-48674?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-48674, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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