net: mana: fix use-after-free in mana_hwc_destroy_channel() by reordering teardown (Linux Linux)

CVE-2026-23454
HIGH 7.0

En bref

Source
NVD
EPSS
EPSS 0.13 % · centile 2 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: net: mana: fix use-after-free in mana_hwc_destroy_channel() by reordering teardown A potential race condition exists in mana_hwc_destroy_channel() where hwc->caller_ctx is freed before the HWC's Completion Queue (CQ) and Event Queue (EQ) are destroyed. This allows an in-flight CQ interrupt handler to dereference freed memory, leading to a use-after-free or NULL pointer dereference in mana_hwc_handle_resp(). mana_smc_teardown_hwc() signals the hardware to stop but does not synchronize against IRQ handlers already executing on other CPUs. The IRQ synchronization only happens in mana_hwc_destroy_cq() via mana_gd_destroy_eq() -> mana_gd_deregister_irq(). Since this runs after kfree(hwc->caller_ctx), a concurrent mana_hwc_rx_event_handler() can dereference freed caller_ctx (and rxq->msg_buf) in mana_hwc_handle_resp(). Fix this by reordering teardown to reverse-of-creation order: destroy the TX/RX work queues and CQ/EQ before freeing hwc->caller_ctx. This ensures all in-flight interrupt handlers complete before the memory they access is freed.

Faiblesses (CWE)

  • CWE-416 — Utilisation après libération

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.0CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f < b88edf12fc3779521ae5f6f1584153b15f7da6df ; affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f < e23bf444512cb85d76012080a76cd1f9e967448e ; affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f < 249e905571583a434d4ea8d6f92ccc0eef337115 ; affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f < 2b001901f689021acd7bf2dceed74a1bdcaaa1f9 ; affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f < afdb1533eb9c05432aeb793a7280fa827c502f5c ; affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f < 05d345719d85b927cba74afac4d5322de3aa4256
Linux · Linuxaffected 5.13 ; unaffected 0 < 5.13 ; unaffected 5.15.203 ≤ 5.15.* ; unaffected 6.1.167 ≤ 6.1.* ; unaffected 6.6.130 ≤ 6.6.* ; unaffected 6.12.78 ≤ 6.12.*

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