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NVD / CVE Program· CNA Linux

CVE-2026-80851: gtp: serialize PDP context updates

—No exploit Fix available

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: 0.19% (FIRST EPSS).
  • Fixed version: Linux Linux 1e995498d29784a06a2b2899370a1926cfc8410d, 3d950e98f74af9611925a5226edced02155f6ed1, 498386b6d402737db1e2eeed4c385acbf0ef9e34.

Low priority for now. Upgrade to Linux Linux 1e995498d29784a06a2b2899370a1926cfc8410d, 3d950e98f74af9611925a5226edced02155f6ed1, 498386b6d402737db1e2eeed4c385acbf0ef9e34 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: gtp: serialize PDP context updates PDP contexts can be deleted through GTP_CMD_DELPDP or while the GTP network device is being unregistered. The latter is serialized by RTNL, but the generic-netlink delete path only holds RCU. Running both paths concurrently can therefore make both paths delete the same PDP context. The issue was found through static analysis and reproduced on a KASAN-enabled kernel by a simple two-thread program racing GTP_CMD_DELPDP against RTM_DELLINK: Oops: general protection fault, probably for non-canonical address KASAN: maybe wild-memory-access in range [0xdead000000000120-0xdead000000000127] RIP: gtp_genl_del_pdp+0x1c1/0x420 [gtp] RBP: dead000000000122 The second deletion dereferenced the poisoned hlist pprev pointer. Serialize gtp_pdp_add(), gtp_genl_del_pdp(), and gtp_dellink() with a shared mutex. Keep the mutex held until the final use of a PDP context in the NEWPDP path, and keep the RCU read-side section around the complete PDP context use in the DELPDP path.

Published
Sep 4, 2026
Updated
Oct 30, 2026
EPSS
0.1% · 9th 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 · 0.1%

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Noroxi analysis

What does it mean in your environment?

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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

    • 4.7affected
    • 459aa660eb1d8ce67080da1983bb81d716aa5a69 and later · before d8ebf8875fb97b3e39aa226af78f9c619e96ee31affected · git
    • 459aa660eb1d8ce67080da1983bb81d716aa5a69 and later · before 6e5472c1c1619793cbadb02bccf7d2d9f826052faffected · git
    • 459aa660eb1d8ce67080da1983bb81d716aa5a69 and later · before d9a83492ffc99f228d91873473e3820300525f00affected · git
    • 459aa660eb1d8ce67080da1983bb81d716aa5a69 and later · before b4ac2a5ce5a96ec21ed48f60d30b52b1fb22c62aaffected · git
    • 459aa660eb1d8ce67080da1983bb81d716aa5a69 and later · before 5f77ddb2756340c1b05381674ca025d52998005eaffected · git
    • 459aa660eb1d8ce67080da1983bb81d716aa5a69 and later · before 3d950e98f74af9611925a5226edced02155f6ed1affected · git
    • 459aa660eb1d8ce67080da1983bb81d716aa5a69 and later · before 6df4f05bc2991467939d7d80b6f7e121559cc3dfaffected · git
    • 459aa660eb1d8ce67080da1983bb81d716aa5a69 and later · before 1e995498d29784a06a2b2899370a1926cfc8410daffected · git
    • 459aa660eb1d8ce67080da1983bb81d716aa5a69 and later · before 498386b6d402737db1e2eeed4c385acbf0ef9e34affected · git

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.1.13-17.1.13-1

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-2026-80849Sep 4, 2026 · net/tcp-ao: fix use-after-free of current_key on reconnect to another peer
    0Monitor
  • ← EarlierCVE-2026-80850Sep 4, 2026 · tcp: fix AO info use-after-free in tcp_ao_connect_init()
    0Monitor
  • Later →CVE-2026-80852Sep 4, 2026 · tls: device: fix out-of-bounds write in tls_append_frag()
    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 Linux1e995498d29784a06a2b2899370a1926cfc8410dVendor (CNA)
Linux Linux3d950e98f74af9611925a5226edced02155f6ed1Vendor (CNA)
Linux Linux498386b6d402737db1e2eeed4c385acbf0ef9e34Vendor (CNA)
Linux Linux5f77ddb2756340c1b05381674ca025d52998005eVendor (CNA)
Linux Linux6df4f05bc2991467939d7d80b6f7e121559cc3dfVendor (CNA)
Linux Linux6e5472c1c1619793cbadb02bccf7d2d9f826052fVendor (CNA)
Linux Linuxb4ac2a5ce5a96ec21ed48f60d30b52b1fb22c62aVendor (CNA)
Linux Linuxd8ebf8875fb97b3e39aa226af78f9c619e96ee31Vendor (CNA)
Linux Linuxd9a83492ffc99f228d91873473e3820300525f00Vendor (CNA)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~deb12u1 · 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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

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.

References

Show all references (8 more)

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

All records