s390/ptrace: handle setting of fpc register correctly (Linux Linux)

CVE-2023-52598
HIGH 7.1

En bref

Source
NVD
EPSS
EPSS 0.24 % · centile 15 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: s390/ptrace: handle setting of fpc register correctly If the content of the floating point control (fpc) register of a traced process is modified with the ptrace interface the new value is tested for validity by temporarily loading it into the fpc register. This may lead to corruption of the fpc register of the tracing process: if an interrupt happens while the value is temporarily loaded into the fpc register, and within interrupt context floating point or vector registers are used, the current fp/vx registers are saved with save_fpu_regs() assuming they belong to user space and will be loaded into fp/vx registers when returning to user space. test_fp_ctl() restores the original user space fpc register value, however it will be discarded, when returning to user space. In result the tracer will incorrectly continue to run with the value that was supposed to be used for the traced process. Fix this by saving fpu register contents with save_fpu_regs() before using test_fp_ctl().

Faiblesses (CWE)

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected 9977e886cbbc758b4b601a160b5825ba573b5ca8 < 6ccf904aac0292e1f6b1a1be6c407c414f7cf713 ; affected 9977e886cbbc758b4b601a160b5825ba573b5ca8 < 6d0822f2cc9b153bf2df49a84599195a2e0d21a8 ; affected 9977e886cbbc758b4b601a160b5825ba573b5ca8 < 856caf2730ea18cb39e95833719c02a02447dc0a ; affected 9977e886cbbc758b4b601a160b5825ba573b5ca8 < 28a1f492cb527f64593457a0a0f0d809b3f36c25 ; affected 9977e886cbbc758b4b601a160b5825ba573b5ca8 < 7a4d6481fbdd661f9e40e95febb95e3dee82bad3 ; affected 9977e886cbbc758b4b601a160b5825ba573b5ca8 < 02c6bbfb08bad78dd014e24c7b893723c15ec7a1
Linux · Linuxaffected 4.3 ; unaffected 0 < 4.3 ; unaffected 4.19.307 ≤ 4.19.* ; unaffected 5.4.269 ≤ 5.4.* ; unaffected 5.10.210 ≤ 5.10.* ; unaffected 5.15.149 ≤ 5.15.*

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