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NVD / CVE Program· CNA Linux

CVE-2023-53716: net: fix skb leak in __skb_tstamp_tx()

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 4.14.316, 4.19.284, 5.10.181.

Low priority for now. Upgrade to Linux Linux 4.14.316, 4.19.284, 5.10.181 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: net: fix skb leak in __skb_tstamp_tx() Commit 50749f2dd685 ("tcp/udp: Fix memleaks of sk and zerocopy skbs with TX timestamp.") added a call to skb_orphan_frags_rx() to fix leaks with zerocopy skbs. But it ended up adding a leak of its own. When skb_orphan_frags_rx() fails, the function just returns, leaking the skb it just cloned. Free it before returning. This bug was discovered and resolved using Coverity Static Analysis Security Testing (SAST) by Synopsys, Inc.

—No exploit Fix available
Published
Oct 22, 2025
Updated
Oct 28, 2026
EPSS
0.2% · 11th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 30290f210ba7426ff7592fe2eb4114b1b5bad219affected
    • 281072fb2a7294cde7acbf5375b879f40a8001b7 and later · before 82501f1ead557cbee1c2467654ec109a80334d22affected · git
    • 1f69c086b20e27763af28145981435423f088268 and later · before 779332447108545ef04682ea29af5f85c0202aeeaffected · git
    • 602fa8af44fd55a58f9e94eb673e8adad2c6cc46 and later · before 58766252f6b2c0487cda6976a53d2bb03ae28e2aaffected · git
    • 230a5ed7d813fb516de81d23f09d7506753e41e9 and later · before a594382ec6d0cc8cff5a8bc7e61b54e3858fb243affected · git
    • 43e4197dd5f6b474a8b16f8b6a42cd45cf4f9d1a and later · before e06841a2abf9c82735cee39e88b1d79464088840affected · git
    • cb52e7f24c1d01a536a847dff0d1d95889cc3b5c and later · before cc18b4685910d5d9de8314bae9c55790701b1811affected · git
    • 426384dd4980040651536fef5feac4dcc4d7ee4e and later · before f4d928c00254cfc9dd0ee7076f4a59bceec675f4affected · git
    • 50749f2dd6854a41830996ad302aef2ffaf011d8 and later · before 8a02fb71d7192ff1a9a47c9d937624966c6e09afaffected · git
    • 6.2.15 and later · before 6.3affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.37-16.1.37-1
Debian:13linuxbefore 6.3.7-16.3.7-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2023-53714Oct 22, 2025 · drm/stm: ltdc: fix late dereference check
    0Monitor
  • ← EarlierCVE-2023-53715Oct 22, 2025 · wifi: brcmfmac: cfg80211: Pass the PMK in binary instead of hex
    0Monitor
  • Later →CVE-2023-53717Oct 22, 2025 · wifi: ath9k: Fix potential stack-out-of-bounds write in ath9k_wmi_rsp_callback()
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux4.14.316Vendor (CNA)
Linux Linux4.19.284Vendor (CNA)
Linux Linux5.10.181Vendor (CNA)
Linux Linux5.15.114Vendor (CNA)
Linux Linux5.4.244Vendor (CNA)
Linux Linux58766252f6b2c0487cda6976a53d2bb03ae28e2aVendor (CNA)
Linux Linux6.1.31Vendor (CNA)
Linux Linux6.3Vendor (CNA)
Linux Linux6.3.5Vendor (CNA)
Linux Linux779332447108545ef04682ea29af5f85c0202aeeVendor (CNA)
Linux Linux82501f1ead557cbee1c2467654ec109a80334d22Vendor (CNA)
Linux Linux8a02fb71d7192ff1a9a47c9d937624966c6e09afVendor (CNA)
Linux Linuxa594382ec6d0cc8cff5a8bc7e61b54e3858fb243Vendor (CNA)
Linux Linuxcc18b4685910d5d9de8314bae9c55790701b1811Vendor (CNA)
Linux Linuxe06841a2abf9c82735cee39e88b1d79464088840Vendor (CNA)
Linux Linuxf4d928c00254cfc9dd0ee7076f4a59bceec675f4Vendor (CNA)
debian:linux6.1.37-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records