HOMEVULNERABILITIESCVE-2026-31512
MEDIUM

CVE-2026-31512

Published: April 22, 2026· Updated: Apr 28, 2026

5.5
CVSS v3.1
EPSS:0.02%probability of exploitation in 30 daysPercentile:6.8th

Official Description

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: L2CAP: Validate PDU length before reading SDU length in l2cap_ecred_data_rcv()

l2cap_ecred_data_rcv() reads the SDU length field from skb->data using

get_unaligned_le16() without first verifying that skb contains at least

L2CAP_SDULEN_SIZE (2) bytes. When skb->len is less than 2, this reads

past the valid data in the skb.

The ERTM reassembly path correctly calls pskb_may_pull() before reading

the SDU length (l2cap_reassemble_sdu, L2CAP_SAR_START case). Apply the

same validation to the Enhanced Credit Based Flow Control data path.

NVD Source

Technical Analysis

CVE-2026-31512 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

Linux1 product
linux kernel
Source: NVD CPE · 3 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://git.kernel.org/stable/c/3340be2bafdcc806f048273ea6d8e82a6597aa1b
PATCHhttps://git.kernel.org/stable/c/40c7f7eea2f4d9cb0b3e924254c8c9053372168f
PATCHhttps://git.kernel.org/stable/c/477ad4976072056c348937e94f24583321938df4
PATCHhttps://git.kernel.org/stable/c/5ad981249be52f5e4e92e0e97b436b569071cb86
PATCHhttps://git.kernel.org/stable/c/8c96f3bd4ae0802db90630be8e9851827e9c9209
PATCHhttps://git.kernel.org/stable/c/c65bd945d1c08c3db756821b6bf9f1c4a77b29c6
PATCHhttps://git.kernel.org/stable/c/cef09691cfb61f6c91cc27c3d69634f81c8ab949
PATCHhttps://git.kernel.org/stable/c/e47315b84d0eb188772c3ff5cf073cdbdefca6b4

All References (8)

→
https://git.kernel.org/stable/c/3340be2bafdcc806f048273ea6d8e82a6597aa1bPatch
→
https://git.kernel.org/stable/c/40c7f7eea2f4d9cb0b3e924254c8c9053372168fPatch
→
https://git.kernel.org/stable/c/477ad4976072056c348937e94f24583321938df4Patch
→
https://git.kernel.org/stable/c/5ad981249be52f5e4e92e0e97b436b569071cb86Patch
→
https://git.kernel.org/stable/c/8c96f3bd4ae0802db90630be8e9851827e9c9209Patch
→
https://git.kernel.org/stable/c/c65bd945d1c08c3db756821b6bf9f1c4a77b29c6Patch
→
https://git.kernel.org/stable/c/cef09691cfb61f6c91cc27c3d69634f81c8ab949Patch
→
https://git.kernel.org/stable/c/e47315b84d0eb188772c3ff5cf073cdbdefca6b4Patch

Quick Facts

CVE IDCVE-2026-31512
CVSS Score5.5 / 10
SeverityMEDIUM
CISA KEVNo
EPSS (30d)0.02%
Affected1 vendor
PublishedApr 22, 2026

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-31512 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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