7.1

CVE-2026-68293

net/mlx5: Fix MCIA register buffer overflow on 32 dword reads

In the Linux kernel, the following vulnerability has been resolved:

net/mlx5: Fix MCIA register buffer overflow on 32 dword reads

The MCIA register can return up to 32 dwords (128 bytes) when the device
advertises the mcia_32dwords capability, but struct
mlx5_ifc_mcia_reg_bits only defines dword_0..11, leaving room for just
12 dwords (48 bytes) of data.

mlx5_query_mcia() clamps the read size to mlx5_mcia_max_bytes() and then
memcpy()s that many bytes out of the register, potentially reading past
the end of the 'out' buffer. On kernels built with FORTIFY_SOURCE this
is caught as a buffer overflow while reading the module EEPROM via
ethtool:

  detected buffer overflow in memcpy
  kernel BUG at lib/string_helpers.c:1048!
  RIP: 0010:fortify_panic+0x13/0x20
  Call Trace:
   mlx5_query_mcia.isra.0+0x200/0x210 [mlx5_core]
   mlx5_query_module_eeprom_by_page+0x4a/0xa0 [mlx5_core]
   mlx5e_get_module_eeprom_by_page+0xbb/0x120 [mlx5_core]
   eeprom_prepare_data+0xf3/0x170
   ethnl_default_doit+0xf1/0x3b0

Extend the mcia_reg layout to 32 dwords.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 271907ee2f29cd1078fd219f0778fd824fb1971c
Version < 5be4eebd5a3a198dab0adcd550e1cadca79bdfed
Status affected
Version 271907ee2f29cd1078fd219f0778fd824fb1971c
Version < 87b39a8c875ca744b7de69af0a8ef8874cffccf1
Status affected
Version 271907ee2f29cd1078fd219f0778fd824fb1971c
Version < 88b2a16ddac3357e3f1d528e758b51e2c945d546
Status affected
Version 271907ee2f29cd1078fd219f0778fd824fb1971c
Version < 11c057d23465c7a5817a7284c896d19d54c0b616
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 5.18
Status affected
Version 0
Version < 5.18
Status unaffected
Version <= 6.12.*
Version 6.12.101
Status unaffected
Version <= 6.18.*
Version 6.18.42
Status unaffected
Version <= 7.1.*
Version 7.1.6
Status unaffected
Version <= *
Version 7.2
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.14% 0.037
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 7.1 1.8 5.2
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/5be4eebd5a3a198dab0adcd550e1cadca79bdfed
https://git.kernel.org/stable/c/87b39a8c875ca744b7de69af0a8ef8874cffccf1
https://git.kernel.org/stable/c/88b2a16ddac3357e3f1d528e758b51e2c945d546
https://git.kernel.org/stable/c/11c057d23465c7a5817a7284c896d19d54c0b616