CVE-2026-31635

CVE Enrichment

CVSS: 7.5 HIGH
EPSS: 0.63%
EPSS Percentile: 48.70%
CISA KEV: Not listed

Description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: fix oversized RESPONSE authenticator length check rxgk_verify_response() decodes auth_len from the packet and is supposed to verify that it fits in the remaining bytes. The existing check is inverted, so oversized RESPONSE authenticators are accepted and passed to rxgk_decrypt_skb(), which can later reach skb_to_sgvec() with an impossible length and hit BUG_ON(len). Decoded from the original latest-net reproduction logs with scripts/decode_stacktrace.sh: RIP: __skb_to_sgvec() [net/core/skbuff.c:5285 (discriminator 1)] Call Trace: skb_to_sgvec() [net/core/skbuff.c:5305] rxgk_decrypt_skb() [net/rxrpc/rxgk_common.h:81] rxgk_verify_response() [net/rxrpc/rxgk.c:1268] rxrpc_process_connection() [net/rxrpc/conn_event.c:266 net/rxrpc/conn_event.c:364 net/rxrpc/conn_event.c:386] process_one_work() [kernel/workqueue.c:3281] worker_thread() [kernel/workqueue.c:3353 kernel/workqueue.c:3440] kthread() [kernel/kthread.c:436] ret_from_fork() [arch/x86/kernel/process.c:164] Reject authenticator lengths that exceed the remaining packet payload.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published: 24-Apr-2026 22:16
Last Modified: 17-Jun-2026 17:34
EPSS Date: 2026-10-11
CWE: CWE-130

CVSS Vector


            CVSS:3.1                            AV:N /
                            AC:L /
                            PR:N /
                            UI:N /
                            S:U /
                            C:N /
                            I:N /
                            A:H

Affected Products / Versions

linux / linux_kernel
Version / affected range: * · from (inclusive) 6.16.1 · before (exclusive) 6.18.23
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: * · from (inclusive) 6.19 · before (exclusive) 6.19.13
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 6.16
cpe:2.3:o:linux:linux_kernel:6.16:-:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.0
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.0
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.0
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.0
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.0
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.0
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.0
cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*

References

Last enrichment sync: 12-Oct-2026 01:15
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

CVE-2026-31635 (DirtyDecrypt): a Linux kernel vulnerability that lets a local attacker escalate privileges due to improper handling of decryption operations and page cache data modification Kaspersky Reports Rising Vulnerability Disclosures and Early Exploit Releases in Q2 2026

CVE (26)

People (2)

Vendors (2)

Products (15)

Tools (4)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.