tls: make sure to abort the stream if headers are bogus (Linux Linux)

CVE-2025-39946
CRITICAL 9.8

En bref

Source
NVD
EPSS
EPSS 10.26 % · centile 96 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: tls: make sure to abort the stream if headers are bogus Normally we wait for the socket to buffer up the whole record before we service it. If the socket has a tiny buffer, however, we read out the data sooner, to prevent connection stalls. Make sure that we abort the connection when we find out late that the record is actually invalid. Retrying the parsing is fine in itself but since we copy some more data each time before we parse we can overflow the allocated skb space. Constructing a scenario in which we're under pressure without enough data in the socket to parse the length upfront is quite hard. syzbot figured out a way to do this by serving us the header in small OOB sends, and then filling in the recvbuf with a large normal send. Make sure that tls_rx_msg_size() aborts strp, if we reach an invalid record there's really no way to recover.

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1CRITICAL 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1CRITICAL 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected 84c61fe1a75b4255df1e1e7c054c9e6d048da417 < b36462146d86b1f22e594fe4dae611dffacfb203 ; affected 84c61fe1a75b4255df1e1e7c054c9e6d048da417 < 4cefe5be73886f383639fe0850bb72d5b568a7b9 ; affected 84c61fe1a75b4255df1e1e7c054c9e6d048da417 < 208640e6225cc929a05adbf79d1df558add3e231 ; affected 84c61fe1a75b4255df1e1e7c054c9e6d048da417 < 61ca2da5fb8f433ce8bbd1657c84a86272133e6b ; affected 84c61fe1a75b4255df1e1e7c054c9e6d048da417 < 0aeb54ac4cd5cf8f60131b4d9ec0b6dc9c27b20d
Linux · Linuxaffected 6.0 ; unaffected 0 < 6.0 ; unaffected 6.1.154 ≤ 6.1.* ; unaffected 6.6.108 ≤ 6.6.* ; unaffected 6.12.49 ≤ 6.12.* ; unaffected 6.16.9 ≤ 6.16.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD