7.8

CVE-2026-23243

RDMA/umad: Reject negative data_len in ib_umad_write

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

RDMA/umad: Reject negative data_len in ib_umad_write

ib_umad_write computes data_len from user-controlled count and the
MAD header sizes. With a mismatched user MAD header size and RMPP
header length, data_len can become negative and reach ib_create_send_mad().
This can make the padding calculation exceed the segment size and trigger
an out-of-bounds memset in alloc_send_rmpp_list().

Add an explicit check to reject negative data_len before creating the
send buffer.

KASAN splat:
[  211.363464] BUG: KASAN: slab-out-of-bounds in ib_create_send_mad+0xa01/0x11b0
[  211.364077] Write of size 220 at addr ffff88800c3fa1f8 by task spray_thread/102
[  211.365867] ib_create_send_mad+0xa01/0x11b0
[  211.365887] ib_umad_write+0x853/0x1c80
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 2be8e3ee8efd6f99ce454115c29d09750915021a
Version < 1371ef6b1ecf3676b8942f5dfb3634fb0648128e
Status affected
Version 2be8e3ee8efd6f99ce454115c29d09750915021a
Version < 362e45fd9069ffa1523f9f1633b606ebf72060d7
Status affected
Version 2be8e3ee8efd6f99ce454115c29d09750915021a
Version < 6eb2919474ca105c5b13d19574e25f0ddcf19ca2
Status affected
Version 2be8e3ee8efd6f99ce454115c29d09750915021a
Version < a6a3e4af10993cb9e4b8f0548680aba0ab5f3b0d
Status affected
Version 2be8e3ee8efd6f99ce454115c29d09750915021a
Version < 9c80d688f402539dfc8f336de1380d6b4ee14316
Status affected
Version 2be8e3ee8efd6f99ce454115c29d09750915021a
Version < 205955f29c26330b1dc7fdeadd5bb97c38e26f56
Status affected
Version 2be8e3ee8efd6f99ce454115c29d09750915021a
Version < 52ab82cc5cf8ada5c3fb6ffe8f32fdb2fc27a34b
Status affected
Version 2be8e3ee8efd6f99ce454115c29d09750915021a
Version < 5551b02fdbfd85a325bb857f3a8f9c9f33397ed2
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 2.6.24
Status affected
Version 0
Version < 2.6.24
Status unaffected
Version <= 5.10.*
Version 5.10.252
Status unaffected
Version <= 5.15.*
Version 5.15.202
Status unaffected
Version <= 6.1.*
Version 6.1.165
Status unaffected
Version <= 6.6.*
Version 6.6.128
Status unaffected
Version <= 6.12.*
Version 6.12.75
Status unaffected
Version <= 6.18.*
Version 6.18.14
Status unaffected
Version <= 6.19.*
Version 6.19.4
Status unaffected
Version <= *
Version 7.0
Status unaffected
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.02% 0.034
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.