VulnerabilityPublished 27 May 2026Updated 30 Oct 2026

CVE-2026-46012: Linux kernel · rxrpc: Fix memory leaks in rxkad_verify_response()

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in c14433e967cff95bebc77c9c4a2a0ed4e0e22783 : update Linux kernel when convenient.

Data as of 30 Oct 2026, 12:36 UTC

Severity

Low

Rated Low by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Patch: Available – fixed in c14433e967cff95bebc77c9c4a2a0ed4e0e22783, c91f33fb8356dedc82bc56ce210f1a5dbee62a52, c4b8f32e73eafd4a5076be890c7c8506ec04567c +3

Exploitation evidence

Disclosed: evidence found.
CVE published 27 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ ec832bd06d6fdf08b0455ab7c2a7a9104e029638, < c14433e967cff95bebc77c9c4a2a0ed4e0e22783	Fixed in c14433e967cff95bebc77c9c4a2a0ed4e0e22783
LinuxLinux	Affected ≥ ec832bd06d6fdf08b0455ab7c2a7a9104e029638, < c91f33fb8356dedc82bc56ce210f1a5dbee62a52	Fixed in c91f33fb8356dedc82bc56ce210f1a5dbee62a52
LinuxLinux	Affected ≥ ec832bd06d6fdf08b0455ab7c2a7a9104e029638, < c4b8f32e73eafd4a5076be890c7c8506ec04567c	Fixed in c4b8f32e73eafd4a5076be890c7c8506ec04567c
LinuxLinux	Affected ≥ ec832bd06d6fdf08b0455ab7c2a7a9104e029638, < 861b9a0a1823bf064a7b810d29502a9ef043f40f	Fixed in 861b9a0a1823bf064a7b810d29502a9ef043f40f
LinuxLinux	Affected ≥ ec832bd06d6fdf08b0455ab7c2a7a9104e029638, < 852b9d64cea421336579b2de3d1338dfa677e2dd	Fixed in 852b9d64cea421336579b2de3d1338dfa677e2dd
LinuxLinux	Affected ≥ ec832bd06d6fdf08b0455ab7c2a7a9104e029638, < 34f61a07e0cdefaecd3ec03bb5fb22215643678f	Fixed in 34f61a07e0cdefaecd3ec03bb5fb22215643678f

AI-suggested

A fix is available in the Linux kernel source code as indicated by the listed fixed commit versions. Users and administrators should update their Linux kernel to a version that includes these fixes to remediate the memory leak. No additional mitigation steps are indicated or necessary beyond applying the official patch.

Description

A memory leak vulnerability in the Linux kernel's rxrpc component was fixed in the rxkad_verify_response() function. The issue was due to improper freeing of allocated memory for the ticket and server key under all code paths. The fix ensures that all allocated resources are released properly by initializing pointers to NULL and consolidating cleanup into a single common epilogue.

Impact

The vulnerability causes memory leaks in the kernel's rxrpc authentication response verification process. While this does not directly lead to code execution or privilege escalation, memory leaks can degrade system stability and performance over time, potentially leading to denial of service conditions under sustained exploitation.

Summary

CVE-2026-46012 addresses a memory leak in the Linux kernel's rxrpc subsystem within the rxkad_verify_response() function. The vulnerability arose because the function did not free the ticket and server key memory in all execution paths, potentially leading to resource exhaustion. The patch initializes the ticket pointer to NULL and restructures the function so that all paths after the first allocation pass through a unified cleanup section that safely frees allocated memory, skipping NULL pointers to avoid double frees or crashes.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 30 Oct 2026, 12:36 UTC

Technical details

References

Community reviews

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