CVE-2024-26803
Linux Kernel 5.13 – 5.15.151
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2024-26803 is a medium-severity Incomplete Cleanup (CWE-459) vulnerability in Linux Linux Kernel. Its CVSS base score is 5.5 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Data from Local System (T1005); ranked at the 13th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SI-14 (Non-persistence) — see the control section below for these in your framework.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-24065
Vulnerability Data
In the Linux kernel, the following vulnerability has been resolved: net: veth: clear GRO when clearing XDP even when down veth sets NETIF_F_GRO automatically when XDP is enabled, because both features use the same NAPI machinery. The logic to clear…
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NETIF_F_GRO sits in veth_disable_xdp() which is called both on ndo_stop and when XDP is turned off. To avoid the flag from being cleared when the device is brought down, the clearing is skipped when IFF_UP is not set. Bringing the device down should indeed not modify its features. Unfortunately, this means that clearing is also skipped when XDP is disabled _while_ the device is down. And there's nothing on the open path to bring the device features back into sync. IOW if user enables XDP, disables it and then brings the device up we'll end up with a stray GRO flag set but no NAPI instances. We don't depend on the GRO flag on the datapath, so the datapath won't crash. We will crash (or hang), however, next time features are sync'ed (either by user via ethtool or peer changing its config). The GRO flag will go away, and veth will try to disable the NAPIs. But the open path never created them since XDP was off, the GRO flag was a stray. If NAPI was initialized before we'll hang in napi_disable(). If it never was we'll crash trying to stop uninitialized hrtimer. Move the GRO flag updates to the XDP enable / disable paths, instead of mixing them with the ndo_open / ndo_close paths.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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V6.4.1
Mitigating Controls (NIST 800-53 r5) AI
Developer testing and evaluation can discover incomplete cleanup through dynamic analysis or resource-leak testing.
Non-persistence mechanisms explicitly initiate resources in a known state and terminate them, directly enforcing cleanup.
Session termination forces explicit release of session-related temporary resources.
Preventing unintended information transfer through shared resources requires complete cleanup of those resources.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Secure-development practices and coding standards normally require proper resource release and cleanup.
Life-cycle management encompasses disposal of temporary resources but does not specifically target runtime cleanup bugs.
Explicitly calls for removing sensitive data after use, directly addressing one class of incomplete cleanup.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Explicitly requires secure deletion of temporary or residual data, directly addressing incomplete cleanup.
SDLC practices include cleanup steps, yet the weakness can still occur if those steps are omitted.
Secure-coding rules can mandate explicit cleanup of temporary resources, but do not guarantee it.
Change-management processes may require cleanup verification, but the control itself does not address the weakness.