dmaengine: fix NULL pointer in channel unregistration function (Linux Linux)

CVE-2023-52492
MEDIUM 4.4

En bref

Source
NVD
EPSS
EPSS 0.27 % · centile 19 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: dmaengine: fix NULL pointer in channel unregistration function __dma_async_device_channel_register() can fail. In case of failure, chan->local is freed (with free_percpu()), and chan->local is nullified. When dma_async_device_unregister() is called (because of managed API or intentionally by DMA controller driver), channels are unconditionally unregistered, leading to this NULL pointer: [ 1.318693] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000d0 [...] [ 1.484499] Call trace: [ 1.486930] device_del+0x40/0x394 [ 1.490314] device_unregister+0x20/0x7c [ 1.494220] __dma_async_device_channel_unregister+0x68/0xc0 Look at dma_async_device_register() function error path, channel device unregistration is done only if chan->local is not NULL. Then add the same condition at the beginning of __dma_async_device_channel_unregister() function, to avoid NULL pointer issue whatever the API used to reach this function.

Faiblesses (CWE)

  • CWE-476 — Déréférencement de pointeur nul

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1MEDIUM 4.4CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:HCISA-ADP
CVSS 3.1MEDIUM 4.4CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:HNVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected d2fb0a0438384fee08a418025f743913020033ce < 9de69732dde4e443c1c7f89acbbed2c45a6a8e17 ; affected d2fb0a0438384fee08a418025f743913020033ce < 047fce470412ab64cb7345f9ff5d06919078ad79 ; affected d2fb0a0438384fee08a418025f743913020033ce < 2ab32986a0b9e329eb7f8f04dd57cc127f797c08 ; affected d2fb0a0438384fee08a418025f743913020033ce < 7f0ccfad2031eddcc510caf4e57f2d4aa2d8a50b ; affected d2fb0a0438384fee08a418025f743913020033ce < 9263fd2a63487c6d04cbb7b74a48fb12e1e352d0 ; affected d2fb0a0438384fee08a418025f743913020033ce < f5c24d94512f1b288262beda4d3dcb9629222fc7
Linux · Linuxaffected 5.6 ; unaffected 0 < 5.6 ; unaffected 5.10.210 ≤ 5.10.* ; unaffected 5.15.149 ≤ 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