CVE-2024-50203

Kernel privilege escalation via undersized BPF trampoline

Published Nov 8, 2024 · Updated Aug 5, 2026

Heap buffer overflow in the arm64 BPF JIT in Linux 6.10.3 through 6.11.5 allows local users to corrupt kernel memory via BPF trampolines. During trampoline sizing, arch_bpf_trampoline_size() uses a stack address, but code generation passes a heap address to emit_a64_mov_i64(), which can emit more instructions than allocated. Reaching the flaw requires an arm64 kernel and CAP_BPF plus CAP_PERFMON; the resulting writes can hijack kernel control flow or panic the system.

CVSS severity7.8
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in the arm64 BPF JIT in Linux 6.10.3 through 6.11.5 allows local users to corrupt kernel memory via BPF trampolines. During trampoline sizing, arch_bpf_trampoline_size() uses a stack address, but code generation passes a heap address to emit_a64_mov_i64(), which can emit more instructions than allocated. Reaching the flaw requires an arm64 kernel and CAP_BPF plus CAP_PERFMON; the resulting writes can hijack kernel control flow or panic the system.

The record

CVE
CVE-2024-50203
Published
Nov 8, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Nov 8, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=077149478497b2f00ff4fd9da2c892defa6418d8 <9e80f366ebfdfafc685fe83a84c34f7ef01cbe88
  2. Affected versionversion=19d3c179a37730caf600a97fed3794feac2b197b <7db1a2121f3c7903b8e397392beec563c3d00950
  3. Affected versionversion=19d3c179a37730caf600a97fed3794feac2b197b <a552e2ef5fd1a6c78267cd4ec5a9b49aa11bbb1c
  4. Affected versionversion=6.10.3 <6.11
  5. Affected versionversion=6.11
  6. Affected versionversion=6d218fcc707d6b2c3616b6cd24b948fd4825cfec
  7. Affected versionversion=d9664e6ff040798a46cdc5d401064f55b8676c83 <f521c2a0c0c4585f36d912bf62c852b88682c4f2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=077149478497b2f00ff4fd9da2c892defa6418d8 <9e80f366ebfdfafc685fe83a84c34f7ef01cbe88; version=19d3c179a37730caf600a97fed3794feac2b197b <7db1a2121f3c7903b8e397392beec563c3d00950; version=19d3c179a37730caf600a97fed3794feac2b197b <a552e2ef5fd1a6c78267cd4ec5a9b49aa11bbb1c; version=6.10.3 <6.11; version=6.11; version=6d218fcc707d6b2c3616b6cd24b948fd4825cfec; version=d9664e6ff040798a46cdc5d401064f55b8676c83 <f521c2a0c0c4585f36d912bf62c852b88682c4f2

Published CVSS scores

7.8Linux Kernel CVE TeamCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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