HOMEVULNERABILITIESCVE-2026-31658
MEDIUM

CVE-2026-31658

Published: April 24, 2026· Updated: Apr 27, 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:

net: altera-tse: fix skb leak on DMA mapping error in tse_start_xmit()

When dma_map_single() fails in tse_start_xmit(), the function returns

NETDEV_TX_OK without freeing the skb. Since NETDEV_TX_OK tells the

stack the packet was consumed, the skb is never freed, leaking memory

on every DMA mapping failure.

Add dev_kfree_skb_any() before returning to properly free the skb.

NVD Source

Technical Analysis

CVE-2026-31658 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/2eb9d67704ca8f1101f7435b85f113ede471f9f2
PATCHhttps://git.kernel.org/stable/c/3aca300e88afe56afb000cdc4c65383014fb17f9
PATCHhttps://git.kernel.org/stable/c/60f462cd2716d86bd2174f9d5e035c9278f30480
PATCHhttps://git.kernel.org/stable/c/6dede3967619b5944003227a5d09fdc21ed57d10
PATCHhttps://git.kernel.org/stable/c/9f3ec44aeb58501d11834048d5d0dbaeacb6d4e7
PATCHhttps://git.kernel.org/stable/c/ae2cd46f57f422b51aedd406ff5d75cbff401d5d
PATCHhttps://git.kernel.org/stable/c/cb1d318702fdf643061350d164250198df4116f2
PATCHhttps://git.kernel.org/stable/c/d5ec406f0543bd6cdfd563b08015fdec8c4d5712

All References (8)

→
https://git.kernel.org/stable/c/2eb9d67704ca8f1101f7435b85f113ede471f9f2Patch
→
https://git.kernel.org/stable/c/3aca300e88afe56afb000cdc4c65383014fb17f9Patch
→
https://git.kernel.org/stable/c/60f462cd2716d86bd2174f9d5e035c9278f30480Patch
→
https://git.kernel.org/stable/c/6dede3967619b5944003227a5d09fdc21ed57d10Patch
→
https://git.kernel.org/stable/c/9f3ec44aeb58501d11834048d5d0dbaeacb6d4e7Patch
→
https://git.kernel.org/stable/c/ae2cd46f57f422b51aedd406ff5d75cbff401d5dPatch
→
https://git.kernel.org/stable/c/cb1d318702fdf643061350d164250198df4116f2Patch
→
https://git.kernel.org/stable/c/d5ec406f0543bd6cdfd563b08015fdec8c4d5712Patch

Quick Facts

CVE IDCVE-2026-31658
CVSS Score5.5 / 10
SeverityMEDIUM
CISA KEVNo
EPSS (30d)0.02%
Affected1 vendor
PublishedApr 24, 2026

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-31658 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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