Kernel crash via wrapped QRTR packet length
Published Aug 15, 2026 · Updated Aug 15, 2026
Integer overflow in the QRTR network component of Linux on 32-bit kernels allows local users to crash the kernel with a crafted packet. The qrtr_endpoint_post() size check aligns a wire-controlled 32-bit length before validating it, so values of 0xfffffffd or greater wrap to zero and let skb_put_data() write beyond the allocated socket buffer. Reachability requires a 32-bit kernel and a local QRTR injection path or an inbound frame from an on-chip modem or coprocessor; the documented result is a kernel oops and service interruption.
Summary
What happened
Integer overflow in the QRTR network component of Linux on 32-bit kernels allows local users to crash the kernel with a crafted packet. The qrtr_endpoint_post() size check aligns a wire-controlled 32-bit length before validating it, so values of 0xfffffffd or greater wrap to zero and let skb_put_data() write beyond the allocated socket buffer. Reachability requires a 32-bit kernel and a local QRTR injection path or an inbound frame from an on-chip modem or coprocessor; the documented result is a kernel oops and service interruption.
The record
- CVE
- CVE-2026-72298
- Published
- Aug 15, 2026
- Updated
- Aug 15, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-119, CWE-787, CWE-680, T1499
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 15, 2026CVE publishedPublication date reported by the CVE source.
- Aug 15, 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.
- Affected versionversion=19892ab9c9d838e2e5a7744d36e4bb8b7c3292fe
- Affected versionversion=26b8d10703a9be45d6097946b2b4011f7dd2c56f
- Affected versionversion=4.19.196 <4.20
- Affected versionversion=5.10.46 <5.10.261
- Affected versionversion=5.12.13 <5.13
- Affected versionversion=5.13
- Affected versionversion=5.4.128 <5.5
- Affected versionversion=960b08dd36de1e341e3eb43d1c547513e338f4f8 <3665e644ea081c4624a1637023b0de3b29f4ae04
- Affected versionversion=ad9d24c9429e2159d1e279dc3a83191ccb4daf1d <20054869770c7df060c5ecee3e8bbf9029c47191
- Affected versionversion=ad9d24c9429e2159d1e279dc3a83191ccb4daf1d <22100a8f73d4ae4f17697dae93d4e2e1d283a6ec
- Affected versionversion=ad9d24c9429e2159d1e279dc3a83191ccb4daf1d <242408b5b763c01288adf3113cbce84378a76e1a
- Affected versionversion=ad9d24c9429e2159d1e279dc3a83191ccb4daf1d <689b7267f8632b4661879dc323e26ebb60978afb
- Affected versionversion=ad9d24c9429e2159d1e279dc3a83191ccb4daf1d <7f72c285f6d3bf63968a0344beee8ab1b370198b
- Affected versionversion=ad9d24c9429e2159d1e279dc3a83191ccb4daf1d <b609f7f46916c6b05585ca82455077198a23770f
- Affected versionversion=ad9d24c9429e2159d1e279dc3a83191ccb4daf1d <d0597074e99731fdad5593e4f6d056a3866f2cab
- Affected versionversion=f8111c0d7ed42ede41a3d0d393b104de0730a8a6
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Published CVSS scores
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Attacks
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