CVE-2022-49341

Local kernel crash via stale BPF JIT length

Published Feb 26, 2025 · Updated May 11, 2026

Denial of service in the arm64 BPF JIT in Linux allows local users to crash the kernel through a BPF program information query. When a JIT image is freed, arch/arm64/net/bpf_jit_comp.c clears prog->bpf_func but leaves prog->jited_len nonzero, so bpf_prog_get_info_by_fd() attempts copy_to_user() from a null address. The flaw requires local access on an arm64 system with BPF JIT activity and interrupts the entire host rather than exposing or modifying data.

CVSS severity5.5
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the arm64 BPF JIT in Linux allows local users to crash the kernel through a BPF program information query. When a JIT image is freed, arch/arm64/net/bpf_jit_comp.c clears prog->bpf_func but leaves prog->jited_len nonzero, so bpf_prog_get_info_by_fd() attempts copy_to_user() from a null address. The flaw requires local access on an arm64 system with BPF JIT activity and interrupts the entire host rather than exposing or modifying data.

The record

CVE
CVE-2022-49341
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=4.16
  2. Affected versionversion=db496944fdaaf2a67d2f60529f5dc23abf809506 <0cf7aaff290cdc4d7cee683d4a18138b0dacac48
  3. Affected versionversion=db496944fdaaf2a67d2f60529f5dc23abf809506 <10f3b29c65bb2fe0d47c2945cd0b4087be1c5218
  4. Affected versionversion=db496944fdaaf2a67d2f60529f5dc23abf809506 <3f4d5e727aeaa610688d46c9f101f78b7f712583
  5. Affected versionversion=db496944fdaaf2a67d2f60529f5dc23abf809506 <41f7c4f85d402043687e863627a1a84fa867c62d
  6. Affected versionversion=db496944fdaaf2a67d2f60529f5dc23abf809506 <5c25a3040bc0486c41a7b63a1fb0de7cdb846ad7
  7. Affected versionversion=db496944fdaaf2a67d2f60529f5dc23abf809506 <aaf61a312af63e1cfe2264c4c5b8cd4ea3626025
  8. Affected versionversion=db496944fdaaf2a67d2f60529f5dc23abf809506 <e412b3d178ea4bf746f6b8ee086761613704c6be

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.16; version=db496944fdaaf2a67d2f60529f5dc23abf809506 <0cf7aaff290cdc4d7cee683d4a18138b0dacac48; version=db496944fdaaf2a67d2f60529f5dc23abf809506 <10f3b29c65bb2fe0d47c2945cd0b4087be1c5218; version=db496944fdaaf2a67d2f60529f5dc23abf809506 <3f4d5e727aeaa610688d46c9f101f78b7f712583; version=db496944fdaaf2a67d2f60529f5dc23abf809506 <41f7c4f85d402043687e863627a1a84fa867c62d; version=db496944fdaaf2a67d2f60529f5dc23abf809506 <5c25a3040bc0486c41a7b63a1fb0de7cdb846ad7; version=db496944fdaaf2a67d2f60529f5dc23abf809506 <aaf61a312af63e1cfe2264c4c5b8cd4ea3626025; version=db496944fdaaf2a67d2f60529f5dc23abf809506 <e412b3d178ea4bf746f6b8ee086761613704c6be

Published CVSS scores

5.5CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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