CVE-2023-52434

HIGHNVD 8.08.0—
EchelonGraph scoreMEDIUM confidence

Score 8.0 from GitHub Security Advisory (severity: HIGH) published 2024-02-20. NVD baseline CVSS 8.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.0
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 8.0Exploit: NoneExposed: 0

A fix is available — apply it.

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

smb: client: fix potential OOBs in smb2_parse_contexts()

Validate offsets and lengths before dereferencing create contexts in smb2_parse_contexts().

This fixes following oops when accessing invalid create contexts from server:

BUG: unable to handle page fault for address: ffff8881178d8cc3 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 4a01067 P4D 4a01067 PUD 0 Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 3 PID: 1736 Comm: mount.cifs Not tainted 6.7.0-rc4 #1 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014 RIP: 0010:smb2_parse_contexts+0xa0/0x3a0 [cifs] Code: f8 10 75 13 48 b8 93 ad 25 50 9c b4 11 e7 49 39 06 0f 84 d2 00 00 00 8b 45 00 85 c0 74 61 41 29 c5 48 01 c5 41 83 fd 0f 76 55 <0f> b7 7d 04 0f b7 45 06 4c 8d 74 3d 00 66 83 f8 04 75 bc ba 04 00 RSP: 0018:ffffc900007939e0 EFLAGS: 00010216 RAX: ffffc90000793c78 RBX: ffff8880180cc000 RCX: ffffc90000793c90 RDX: ffffc90000793cc0 RSI: ffff8880178d8cc0 RDI: ffff8880180cc000 RBP: ffff8881178d8cbf R08: ffffc90000793c22 R09: 0000000000000000 R10: ffff8880180cc000 R11: 0000000000000024 R12: 0000000000000000 R13: 0000000000000020 R14: 0000000000000000 R15: ffffc90000793c22 FS: 00007f873753cbc0(0000) GS:ffff88806bc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8881178d8cc3 CR3: 00000000181ca000 CR4: 0000000000750ef0 PKRU: 55555554 Call Trace: ? __die+0x23/0x70 ? page_fault_oops+0x181/0x480 ? search_module_extables+0x19/0x60 ? srso_alias_return_thunk+0x5/0xfbef5 ? exc_page_fault+0x1b6/0x1c0 ? asm_exc_page_fault+0x26/0x30 ? smb2_parse_contexts+0xa0/0x3a0 [cifs] SMB2_open+0x38d/0x5f0 [cifs] ? smb2_is_path_accessible+0x138/0x260 [cifs] smb2_is_path_accessible+0x138/0x260 [cifs] cifs_is_path_remote+0x8d/0x230 [cifs] cifs_mount+0x7e/0x350 [cifs] cifs_smb3_do_mount+0x128/0x780 [cifs] smb3_get_tree+0xd9/0x290 [cifs] vfs_get_tree+0x2c/0x100 ? capable+0x37/0x70 path_mount+0x2d7/0xb80 ? srso_alias_return_thunk+0x5/0xfbef5 ? _raw_spin_unlock_irqrestore+0x44/0x60 __x64_sys_mount+0x11a/0x150 do_syscall_64+0x47/0xf0 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f8737657b1e

CVSS v3
8.0
EG Score
8.0(medium)
EG Risk
—
EPSS
43.2%
KEV
Not listed

Published

February 20, 2024

Last Modified

January 17, 2025

References (14)

Vendor Advisories for CVE-2023-52434(8)

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

Patch Availability(30)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.113.123~20.04.1) @ focal2026-05-23ubuntu
ubuntulinux-tools-aws-lts-22.04 (5.15.0.1063.63) @ jammy2026-05-23ubuntu
ubuntulinux-tools-azure-lts-22.04 (5.15.0.1066.64) @ jammy2026-05-23ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1058.56) @ jammy2026-05-23ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.4.0-1049 (5.4.0-1049.53) @ focal2026-05-23ubuntu
ubuntulinux-tools-azure-lts-20.04 (5.4.0.1135.129) @ focal2026-05-23ubuntu
ubuntulinux-tools-azure-lts-22.04 (5.15.0.1075.73) @ jammy2026-05-23ubuntu
ubuntulinux-tools-bluefield (5.4.0.1090.86) @ focal2026-05-23ubuntu
ubuntulinux-tools-azure-edge (5.4.0.1135.142~18.04.1) @ bionic2026-05-23ubuntu
ubuntulinux-tools-raspi-hwe-18.04-edge (5.4.0.1114.126~18.04.1) @ bionic2026-05-23ubuntu
ubuntulinux-tools-oracle-lts-20.04 (5.4.0.1129.122) @ focal2026-05-23ubuntu
ubuntulinux-tools-azure-edge (5.15.0.1078.87~20.04.1) @ focal2026-05-23ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.5.0.27.27) @ mantic2026-05-23ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1061.57) @ jammy2026-05-23ubuntu
ubuntulinux-tools-raspi-nolpae (6.5.0.1014.15) @ mantic2026-05-23ubuntu
ubuntulinux-xilinx-zynqmp-tools-host (5.15.0-1030.34) @ jammy2026-05-23ubuntu
ubuntulinux-tools-gkeop-edge (5.15.0.1046.53~20.04.1) @ focal2026-05-23ubuntu
ubuntulinux-tools-intel-iotg-edge (5.15.0.1058.64~20.04.1) @ focal2026-05-23ubuntu
ubuntulinux-tools-nvidia-lowlatency (5.15.0.1058.58) @ jammy2026-05-23ubuntu
ubuntulinux-tools-ibm-edge (5.15.0.1057.60~20.04.1) @ focal2026-05-23ubuntu
redhatkernel-0:4.18.0-477.74.1.el8_82024-09-24redhat
redhatkernel-0:4.18.0-372.119.1.el8_62024-08-21redhat
redhatkernel-0:5.14.0-284.75.1.el9_22024-07-24redhat
redhatkernel-rt-0:5.14.0-284.75.1.rt14.360.el9_22024-07-24redhat
redhatkernel-0:5.14.0-70.105.1.el9_02024-07-09redhat
redhatkernel-rt-0:5.14.0-70.105.1.rt21.177.el9_02024-07-09redhat
redhatkernel-0:4.18.0-553.el8_102024-05-22redhat
redhatkernel-rt-0:4.18.0-553.rt7.342.el8_102024-05-22redhat
redhatkernel-0:5.14.0-427.13.1.el9_42024-04-30redhat
linuxKernel @ 5.4.277—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.

Additional Vendor Advisories

(17)

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 12× in last 7d / 47× 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.

  1. 2026-07-22 23:15 UTCEG score recompute
  2. 2026-07-22 14:07 UTCEPSS rescore
  3. 2026-07-22 14:07 UTCEPSS rescore
  4. 2026-07-21 15:23 UTCEPSS rescore
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  16. 2026-07-13 22:28 UTCEPSS rescore
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  18. 2026-07-13 06:38 UTCOSV refresh
  19. 2026-07-13 06:11 UTCEPSS rescore
  20. 2026-07-12 05:45 UTCEPSS rescore
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  25. 2026-07-07 13:45 UTCEPSS rescore
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  1. 2026-07-07 13:44 UTCEPSS rescore
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  8. 2026-07-01 15:05 UTCEPSS rescore
  9. 2026-06-30 23:21 UTCEPSS rescore
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  16. 2026-06-25 13:48 UTCEPSS rescore
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  18. 2026-06-24 19:31 UTCOSV refresh
  19. 2026-06-24 14:04 UTCEPSS rescore
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  21. 2026-06-23 21:31 UTCEPSS rescore
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  23. 2026-06-22 14:24 UTCEPSS rescore
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  25. 2026-06-21 14:55 UTCEPSS rescore
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  37. 2026-06-13 22:59 UTCEPSS rescore
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  39. 2026-06-12 23:11 UTCEPSS rescore
  40. 2026-06-11 13:59 UTCEPSS rescore
  41. 2026-06-10 22:17 UTCEPSS rescore
  42. 2026-06-10 13:21 UTCEPSS rescore
  43. 2026-06-08 14:16 UTCEPSS rescore
  44. 2026-06-08 14:16 UTCEPSS rescore
  45. 2026-06-07 20:46 UTCOSV refresh
  46. 2026-06-07 15:24 UTCEPSS rescore
  47. 2026-06-07 15:24 UTCEPSS rescore
  48. 2026-06-06 13:46 UTCEPSS rescore
  49. 2026-06-06 13:46 UTCEPSS rescore
  50. 2026-06-05 22:46 UTCEPSS rescore
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  52. 2026-06-05 06:09 UTCEPSS rescore
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  54. 2026-06-04 13:11 UTCEPSS rescore
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  56. 2026-06-02 20:12 UTCEPSS rescore
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  58. 2026-06-01 13:51 UTCEPSS rescore
  59. 2026-05-31 00:15 UTCEPSS rescore
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  61. 2026-05-29 13:43 UTCEPSS rescore
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  63. 2026-05-27 13:39 UTCEPSS rescore
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  65. 2026-05-26 13:43 UTCEPSS rescore
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  67. 2026-05-26 07:18 UTCEPSS rescore
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  69. 2026-05-26 07:18 UTCEPSS rescore
  70. 2026-05-23 10:14 UTCEG score recompute
  71. 2026-05-23 10:14 UTCVendor advisory
  72. 2026-05-23 10:14 UTCGHSA enrichment

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

Frequently asked(5)

What is CVE-2023-52434?
CVE-2023-52434 is a high vulnerability published on February 20, 2024. In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential OOBs in smb2parsecontexts() Validate offsets and lengths before dereferencing create contexts in smb2parsecontexts(). This fixes following oops when accessing invalid create contexts from server: BUG:…
When was CVE-2023-52434 disclosed?
CVE-2023-52434 was first published in the National Vulnerability Database on February 20, 2024, with the most recent update on January 17, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-52434 actively exploited?
CVE-2023-52434 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 43.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-52434?
CVE-2023-52434 has a CVSS v3 base score of 8.0 (NVD).
How do I remediate CVE-2023-52434?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-52434, 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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