Adjacent-network kernel compromise via AoE refcount underflow
Published Oct 21, 2024 · Updated Aug 5, 2026
Use-after-free in the Linux kernel AoE driver allows attackers to execute kernel code or crash the host via crafted AoE frames. The revalidate, aoecmd_ata_rw, resend, probe, and aoecmd_cfg_rsp paths queue packets without dev_hold(), while tx() still calls dev_put(), driving skb->dev's reference count below zero. Exploitation requires the AoE driver to be loaded and the attacker to share the target's Ethernet segment; successful memory reuse can compromise the kernel, while the reference error can panic it.
Summary
What happened
Use-after-free in the Linux kernel AoE driver allows attackers to execute kernel code or crash the host via crafted AoE frames. The revalidate, aoecmd_ata_rw, resend, probe, and aoecmd_cfg_rsp paths queue packets without dev_hold(), while tx() still calls dev_put(), driving skb->dev's reference count below zero. Exploitation requires the AoE driver to be loaded and the attacker to share the target's Ethernet segment; successful memory reuse can compromise the kernel, while the reference error can panic it.
The record
- CVE
- CVE-2024-49982
- Published
- Oct 21, 2024
- Updated
- Aug 5, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-416, T1210
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 21, 2024CVE publishedPublication date reported by the CVE source.
- 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.
- Affected versionversion=079cba4f4e307c69878226fdf5228c20aa1c969c
- Affected versionversion=1a54aa506b3b2f31496731039e49778f54eee881 <a786265aecf39015418e4f930cc1c14603a01490
- Affected versionversion=4.19.311 <4.19.323
- Affected versionversion=5.10.214 <5.10.227
- Affected versionversion=5.15.153 <5.15.168
- Affected versionversion=5.4.273 <5.4.285
- Affected versionversion=6.1.83 <6.1.113
- Affected versionversion=6.6.23 <6.6.55
- Affected versionversion=6.7.11 <6.8
- Affected versionversion=6.8.2 <6.9
- Affected versionversion=6.9
- Affected versionversion=74ca3ef68d2f449bc848c0a814cefc487bf755fa <bc2cbf7525ac288e07d465f5a1d8cb8fb9599254
- Affected versionversion=7dd09fa80b0765ce68bfae92f4e2f395ccf0fba4 <07b418d50ccbbca7e5d87a3a0d41d436cefebf79
- Affected versionversion=a16fbb80064634b254520a46395e36b87ca4731e
- Affected versionversion=ad80c34944d7175fa1f5c7a55066020002921a99 <12f7b89dd72b25da4eeaa22097877963cad6418e
- Affected versionversion=eb48680b0255a9e8a9bdc93d6a55b11c31262e62 <acc5103a0a8c200a52af7d732c36a8477436a3d3
- Affected versionversion=f98364e926626c678fb4b9004b75cacf92ff0662 <6d6e54fc71ad1ab0a87047fd9c211e75d86084a3
- Affected versionversion=f98364e926626c678fb4b9004b75cacf92ff0662 <8253a60c89ec35c8f36fb2cc08cdf854c7a3eb58
- Affected versionversion=f98364e926626c678fb4b9004b75cacf92ff0662 <89d9a69ae0c667e4d9d028028e2dcc837bae626f
- Affected versionversion=faf0b4c5e00bb680e8e43ac936df24d3f48c8e65 <f63461af2c1a86af4217910e47a5c46e3372e645
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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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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