01 Record

CVE-2026-31533

net/tls: fix use-after-free in -EBUSY error path of tls_do_encryption

CriticalPUBLISHEDCNA: Linux

CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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02 Description

net/tls: fix use-after-free in -EBUSY error path of tls_do_encryption

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.39% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 33.7% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-10-19.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-04-23 15:11Z6 MO AGO

Last updated

2026-10-19 18:45Z9 DAYS AGO

Reserved

2026-03-09

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

CWE-416Use After FreeVariant

Data version

5.2

Document digest

d2951a4abeccae527e0c7a322bf5e2a4289e30242c0b6a6f6a9cecbf65b0030d

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux3ade391adc584f17b5570fd205de3ad029090368 to < 414fc5e5a5aff776c150f1b86770e0a25a35df3a, cd1bbca03f3c1d845ce274c0d0a66de8e5929f72 to < 02f3ecadb23558bbe068e6504118f1b712d4ece0, 13eca403876bbea3716e82cdfe6f1e6febb38754 to < 0e43e0a3c94044acc74b8e0927c27972eb5a59e8, 8590541473188741055d27b955db0777569438e3 to < aa9facde6c5005205874c37db3fd25799d741baf, 8590541473188741055d27b955db0777569438e3 to < 5d70eb25b41e9b010828cd12818b06a0c3b04412, 8590541473188741055d27b955db0777569438e3 to < 2694d408b0e595024e0fc1d64ff9db0358580f74, 8590541473188741055d27b955db0777569438e3 to < a9b8b18364fffce4c451e6f6fd218fa4ab646705, ab6397f072e5097f267abf5cb08a8004e6b17694, 5.15.160 to < 5.15.203, 6.1.84 to < 6.1.169, 6.6.18 to < 6.6.135, 6.7.6 to < 6.8, 6.8—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/414fc5e5a5aff776c150f1b86770e0a25a35df3a
git.kernel.orghttps://git.kernel.org/stable/c/02f3ecadb23558bbe068e6504118f1b712d4ece0
git.kernel.orghttps://git.kernel.org/stable/c/0e43e0a3c94044acc74b8e0927c27972eb5a59e8
git.kernel.orghttps://git.kernel.org/stable/c/aa9facde6c5005205874c37db3fd25799d741baf
git.kernel.orghttps://git.kernel.org/stable/c/5d70eb25b41e9b010828cd12818b06a0c3b04412
git.kernel.orghttps://git.kernel.org/stable/c/2694d408b0e595024e0fc1d64ff9db0358580f74
git.kernel.orghttps://git.kernel.org/stable/c/a9b8b18364fffce4c451e6f6fd218fa4ab646705
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-082556.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-019113.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-457936.html

07 Fixed in

Debian 12

linux
Fixed in 6.1.170-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.12.85-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 6.19.13-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.