CVE-2024-38540

MEDIUMNVD 4.44.4—
EchelonGraph scoreMEDIUM confidence

Score 4.4 from GitHub Security Advisory published 2024-06-19. NVD baseline CVSS 4.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
4.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.4Exploit: NoneExposed: 0

A fix is available — apply it.

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

bnxt_re: avoid shift undefined behavior in bnxt_qplib_alloc_init_hwq

Undefined behavior is triggered when bnxt_qplib_alloc_init_hwq is called with hwq_attr->aux_depth != 0 and hwq_attr->aux_stride == 0. In that case, "roundup_pow_of_two(hwq_attr->aux_stride)" gets called. roundup_pow_of_two is documented as undefined for 0.

Fix it in the one caller that had this combination.

The undefined behavior was detected by UBSAN: UBSAN: shift-out-of-bounds in ./include/linux/log2.h:57:13 shift exponent 64 is too large for 64-bit type 'long unsigned int' CPU: 24 PID: 1075 Comm: (udev-worker) Not tainted 6.9.0-rc6+ #4 Hardware name: Abacus electric, s.r.o. - servis@abacus.cz Super Server/H12SSW-iN, BIOS 2.7 10/25/2023 Call Trace: dump_stack_lvl+0x5d/0x80 ubsan_epilogue+0x5/0x30 __ubsan_handle_shift_out_of_bounds.cold+0x61/0xec __roundup_pow_of_two+0x25/0x35 [bnxt_re] bnxt_qplib_alloc_init_hwq+0xa1/0x470 [bnxt_re] bnxt_qplib_create_qp+0x19e/0x840 [bnxt_re] bnxt_re_create_qp+0x9b1/0xcd0 [bnxt_re] ? srso_alias_return_thunk+0x5/0xfbef5 ? srso_alias_return_thunk+0x5/0xfbef5 ? __kmalloc+0x1b6/0x4f0 ? create_qp.part.0+0x128/0x1c0 [ib_core] ? __pfx_bnxt_re_create_qp+0x10/0x10 [bnxt_re] create_qp.part.0+0x128/0x1c0 [ib_core] ib_create_qp_kernel+0x50/0xd0 [ib_core] create_mad_qp+0x8e/0xe0 [ib_core] ? __pfx_qp_event_handler+0x10/0x10 [ib_core] ib_mad_init_device+0x2be/0x680 [ib_core] add_client_context+0x10d/0x1a0 [ib_core] enable_device_and_get+0xe0/0x1d0 [ib_core] ib_register_device+0x53c/0x630 [ib_core] ? srso_alias_return_thunk+0x5/0xfbef5 bnxt_re_probe+0xbd8/0xe50 [bnxt_re] ? __pfx_bnxt_re_probe+0x10/0x10 [bnxt_re] auxiliary_bus_probe+0x49/0x80 ? driver_sysfs_add+0x57/0xc0 really_probe+0xde/0x340 ? pm_runtime_barrier+0x54/0x90 ? __pfx___driver_attach+0x10/0x10 __driver_probe_device+0x78/0x110 driver_probe_device+0x1f/0xa0 __driver_attach+0xba/0x1c0 bus_for_each_dev+0x8f/0xe0 bus_add_driver+0x146/0x220 driver_register+0x72/0xd0 __auxiliary_driver_register+0x6e/0xd0 ? __pfx_bnxt_re_mod_init+0x10/0x10 [bnxt_re] bnxt_re_mod_init+0x3e/0xff0 [bnxt_re] ? __pfx_bnxt_re_mod_init+0x10/0x10 [bnxt_re] do_one_initcall+0x5b/0x310 do_init_module+0x90/0x250 init_module_from_file+0x86/0xc0 idempotent_init_module+0x121/0x2b0 __x64_sys_finit_module+0x5e/0xb0 do_syscall_64+0x82/0x160 ? srso_alias_return_thunk+0x5/0xfbef5 ? syscall_exit_to_user_mode_prepare+0x149/0x170 ? srso_alias_return_thunk+0x5/0xfbef5 ? syscall_exit_to_user_mode+0x75/0x230 ? srso_alias_return_thunk+0x5/0xfbef5 ? do_syscall_64+0x8e/0x160 ? srso_alias_return_thunk+0x5/0xfbef5 ? __count_memcg_events+0x69/0x100 ? srso_alias_return_thunk+0x5/0xfbef5 ? count_memcg_events.constprop.0+0x1a/0x30 ? srso_alias_return_thunk+0x5/0xfbef5 ? handle_mm_fault+0x1f0/0x300 ? srso_alias_return_thunk+0x5/0xfbef5 ? do_user_addr_fault+0x34e/0x640 ? srso_alias_return_thunk+0x5/0xfbef5 ? srso_alias_return_thunk+0x5/0xfbef5 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f4e5132821d Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e3 db 0c 00 f7 d8 64 89 01 48 RSP: 002b:00007ffca9c906a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 RAX: ffffffffffffffda RBX: 0000563ec8a8f130 RCX: 00007f4e5132821d RDX: 0000000000000000 RSI: 00007f4e518fa07d RDI: 000000000000003b RBP: 00007ffca9c90760 R08: 00007f4e513f6b20 R09: 00007ffca9c906f0 R10: 0000563ec8a8faa0 R11: 0000000000000246 R12: 00007f4e518fa07d R13: 0000000000020000 R14: 0000563ec8409e90 R15: 0000563ec8a8fa60 ---[ end trace ]---

CVSS v3
4.4
EG Score
4.4(medium)
EG Risk
20(Track)
EG Risk 20/100SSVC: 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
Severity44% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
16.1%
KEV
Not listed

Published

June 19, 2024

Last Modified

November 3, 2025

References (11)

Vendor Advisories for CVE-2024-38540(7)

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

Patch Availability(22)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-intel-iotg-edge (5.15.0.1083.89~20.04.1) @ focal2026-05-23ubuntu
ubuntulinux-tools-kvm-5.15 (5.15.0.1084.80) @ jammy2026-05-23ubuntu
ubuntulinux-xilinx-zynqmp-tools-host (5.15.0-1052.56) @ jammy2026-05-23ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1094.79) @ jammy2026-05-23ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1083.81) @ jammy2026-05-23ubuntu
ubuntulinux-tools-azure-edge (5.15.0.1094.103~20.04.1) @ focal2026-05-23ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.144.141) @ jammy2026-05-23ubuntu
ubuntulinux-tools-realtime-5.15 (5.15.0.1088.92) @ jammy2026-05-23ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.8.0-40.40) @ noble2026-05-23ubuntu
ubuntulinux-tools-oem-24.04a (6.8.0-1010.10) @ noble2026-05-23ubuntu
ubuntulinux-tools-oracle-64k (6.8.0-1010.10) @ noble2026-05-23ubuntu
ubuntulinux-tools-raspi (6.8.0-1009.10) @ noble2026-05-23ubuntu
ubuntulinux-tools-gcp-fips-5.15 (5.15.0.1087.77) @ jammy2026-05-23ubuntu
ubuntulinux-tools-azure-lts-22.04 (5.15.0.1094.92) @ jammy2026-05-23ubuntu
redhatkernel-0:4.18.0-553.27.1.el8_102024-11-05redhat
redhatkernel-rt-0:4.18.0-553.27.1.rt7.368.el8_102024-11-05redhat
redhatkernel-rt-0:5.14.0-284.82.1.rt14.367.el9_22024-09-04redhat
redhatkernel-0:4.18.0-372.121.1.el8_62024-09-04redhat
redhatkernel-0:5.14.0-284.82.1.el9_22024-09-04redhat
redhatkernel-0:4.18.0-477.70.1.el8_82024-09-03redhat
redhatkernel-0:5.14.0-427.33.1.el9_42024-08-28redhat
linuxKernel @ 5.15.181—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.

Additional Vendor Advisories

(15)

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. 2026-07-23 02:38 UTCEG score recompute
  2. 2026-07-22 14:07 UTCEPSS rescore
  3. 2026-07-22 14:07 UTCEPSS rescore
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  17. 2026-07-14 03:55 UTCOSV refresh
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  17. 2026-06-26 01:46 UTCOSV refresh
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  42. 2026-06-10 22:17 UTCEPSS rescore
  43. 2026-06-10 13:21 UTCEPSS rescore
  44. 2026-06-08 14:41 UTCOSV refresh
  45. 2026-06-08 14:16 UTCEPSS rescore
  46. 2026-06-07 15:24 UTCEPSS rescore
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  73. 2026-05-23 23:44 UTCEG score recompute
  74. 2026-05-23 23:44 UTCVendor advisory
  75. 2026-05-23 23:44 UTCGHSA enrichment

Related CVEs(same product + same vendor)

Frequently asked(5)

What is CVE-2024-38540?
CVE-2024-38540 is a medium vulnerability published on June 19, 2024. In the Linux kernel, the following vulnerability has been resolved: bnxtre: avoid shift undefined behavior in bnxtqpliballocinit_hwq Undefined behavior is triggered when bnxtqpliballocinithwq is called with hwqattr->auxdepth != 0 and hwqattr->auxstride == 0. In that case,…
When was CVE-2024-38540 disclosed?
CVE-2024-38540 was first published in the National Vulnerability Database on June 19, 2024, with the most recent update on November 3, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-38540 actively exploited?
CVE-2024-38540 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 16.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2024-38540?
CVE-2024-38540 has a CVSS v3 base score of 4.4 (NVD).
How do I remediate CVE-2024-38540?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-38540, 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.

Dependency Blast Radius

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