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serial: sc16is7xx: convert from _raw_ to _noinc_ regmap functions for FIFO (Linux Linux)

CVE-2023-52488
MEDIUM 5.5

En bref

Source
NVD
EPSS
EPSS 0.29 % · centile 22 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Analyzed

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Description

In the Linux kernel, the following vulnerability has been resolved: serial: sc16is7xx: convert from _raw_ to _noinc_ regmap functions for FIFO The SC16IS7XX IC supports a burst mode to access the FIFOs where the initial register address is sent ($00), followed by all the FIFO data without having to resend the register address each time. In this mode, the IC doesn't increment the register address for each R/W byte. The regmap_raw_read() and regmap_raw_write() are functions which can perform IO over multiple registers. They are currently used to read/write from/to the FIFO, and although they operate correctly in this burst mode on the SPI bus, they would corrupt the regmap cache if it was not disabled manually. The reason is that when the R/W size is more than 1 byte, these functions assume that the register address is incremented and handle the cache accordingly. Convert FIFO R/W functions to use the regmap _noinc_ versions in order to remove the manual cache control which was a workaround when using the _raw_ versions. FIFO registers are properly declared as volatile so cache will not be used/updated for FIFO accesses.

Références

Scores

VersionScoreVecteurÉvalué par
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 dfeae619d781dee61666d5551b93ba3be755a86b < 4e37416e4ee1b1bc17364a68973e0c63be89e611 ; affected dfeae619d781dee61666d5551b93ba3be755a86b < e635f652696ef6f1230621cfd89c350cb5ec6169 ; affected dfeae619d781dee61666d5551b93ba3be755a86b < 416b10d2817c94db86829fb92ad43ce7d002c573 ; affected dfeae619d781dee61666d5551b93ba3be755a86b < 084c24e788d9cf29c55564de368bf5284f2bb5db ; affected dfeae619d781dee61666d5551b93ba3be755a86b < aa7cb4787698add9367b19f7afc667662c9bdb23 ; affected dfeae619d781dee61666d5551b93ba3be755a86b < dbf4ab821804df071c8b566d9813083125e6d97b
Linux · Linuxaffected 3.16 ; unaffected 0 < 3.16 ; unaffected 5.10.215 ≤ 5.10.* ; unaffected 5.15.154 ≤ 5.15.* ; unaffected 6.1.76 ≤ 6.1.* ; unaffected 6.6.15 ≤ 6.6.*

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