CVE-2025-39946
mediumpriority · track · 36EPSS 0.103 · 96 %ileexploit · PoCDEEUNLRUUSEPSS · scored 2026-10-27
In the Linux kernel, the following vulnerability has been resolved: tls: make sure to abort the stream if headers are bogus Normally we wait for the socket to buffer up the whole record before we service it. If the socket has a tiny buffer, however, we read out the data sooner, to prevent connection stalls. Make sure that we abort the connection when we find out late that the record is actually invalid. Retrying the parsing is fine in itself but since we copy some more data each time before we parse we can overflow the allocated skb space. Constructing a scenario in which we're under pressure without enough data in the socket to parse the length upfront is quite hard. syzbot figured out a way to do this by serving us the header in small OOB sends, and then filling in the recvbuf with a large normal send. Make sure that tls_rx_msg_size() aborts strp, if we reach an invalid record there's really no way to recover.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 5.2–9.8
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
exploits (1)
Public proof-of-concept and weaponised exploit code.
affected products (48)
Products and version ranges known to be affected.
- NetApp ActiveIQ Unified Manager vSphereall versionscert_bundDEcpe:/a:netapp:active_iq_unified_manager:vsphere
advisories (5)
Vendor and ecosystem advisories describing this.
- NCSC-2026-0074Kwetsbaarheden verholpen in Google Android en Samsung MobileNL2026-03-03csaf · ncsc_nlNL
Google heeft kwetsbaarheden verholpen in Android. In deze update zijn ook updates meegenomen voor closed-source componenten van Qualcomm, Imagination Technologies, Unisoc en MediaTek. Samsung heeft kwetsbaarheden in Samsung Mobile verholpen die relevant zijn voor Samsung mobile devices.
- WID-SEC-W-2025-2194Linux Kernel: Mehrere SchwachstellenDeutsch2025-10-05csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen in Linux Kernel ausnutzen, um nicht näher spezifizierte Angriffe durchzuführen.
- WID-SEC-W-2026-0569Google Android: Mehrere SchwachstellenDeutsch2026-03-02csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Google Android ausnutzen, um sich erweiterte Berechtigungen zu verschaffen, beliebigen Code auszuführen, einen Denial-of-Service-Zustand zu verursachen, vertrauliche Informationen offenzulegen oder andere nicht näher spezifizierte Angriffe durchzuführen.
- ASB-A-4327284722026-03-01vendor · osvUS
In tls_rx_msg_size of tls_sw.c, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
- ASB-A-4466487702026-03-01vendor · osvUS
In multiple locations, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
also known as (8)
Other names and identifiers for this entity.
- CNNVD-202510-678cnnvd
- EUVD-2025-32393enisa_euvd
- BDU:2025-12556fstec_bdu
- GHSA-cgf5-f6fj-4v5qenisa_euvd
- A-432728472osv
- A-446648770osv
- ASB-A-432728472osv
- ASB-A-446648770osv
sources
Which sources assert this record, and when.
references (17)
External citations — patches, advisories, analysis.
- https://git.kernel.org/stable/c/0aeb54ac4cd5cf8f60131b4d9ec0b6dc9c27b20dcnnvd
- https://git.kernel.org/stable/c/208640e6225cc929a05adbf79d1df558add3e231cnnvd
- https://git.kernel.org/stable/c/4cefe5be73886f383639fe0850bb72d5b568a7b9cnnvd
- https://git.kernel.org/stable/c/61ca2da5fb8f433ce8bbd1657c84a86272133e6bcnnvd
- https://git.kernel.org/stable/c/b36462146d86b1f22e594fe4dae611dffacfb203cnnvd
- https://vigilance.fr/vulnerability/Linux-kernel-multiple-vulnerabilities-dated-06-10-2025-48395cnnvd
- https://www.kernel.org/Patchcnnvd
- https://git.kernel.org/stable/c/0aeb54ac4cd5cf8f60131b4d9ec0b6dc9c27b20denisa_euvd
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