CVE-2026-43205
published 2026-05-06CVE-2026-43205: In the Linux kernel, the following vulnerability has been resolved: dpaa2-switch: validate num_ifs to prevent out-of-bounds write The driver obtains…
PriorityP341high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.14%
3.6th percentile
In the Linux kernel, the following vulnerability has been resolved:
dpaa2-switch: validate num_ifs to prevent out-of-bounds write
The driver obtains sw_attr.num_ifs from firmware via dpsw_get_attributes()
but never validates it against DPSW_MAX_IF (64). This value controls
iteration in dpaa2_switch_fdb_get_flood_cfg(), which writes port indices
into the fixed-size cfg->if_id[DPSW_MAX_IF] array. When firmware reports
num_ifs >= 64, the loop can write past the array bounds.
Add a bound check for num_ifs in dpaa2_switch_init().
dpaa2_switch_fdb_get_flood_cfg() appends the control interface (port
num_ifs) after all matched ports. When num_ifs == DPSW_MAX_IF and all
ports match the flood filter, the loop fills all 64 slots and the control
interface write overflows by one entry.
The check uses >= because num_ifs == DPSW_MAX_IF is also functionally
broken.
build_if_id_bitmap() silently drops any ID >= 64:
if (id[i] < DPSW_MAX_IF)
bmap[id[i] / 64] |= ...
Affected
42 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= 539dda3c5d190c5088b5e57944b1b482fcb464de < a26dda3bae469c8e4e1b1993ad33dafa32d0fc28 | a26dda3bae469c8e4e1b1993ad33dafa32d0fc28 |
| linux | linux | >= 539dda3c5d190c5088b5e57944b1b482fcb464de < a3034a8d56174dd6464c46823438f25797910a8d | a3034a8d56174dd6464c46823438f25797910a8d |
| linux | linux | >= 539dda3c5d190c5088b5e57944b1b482fcb464de < b690635d4719214892855b79ce018d4b1672ac96 | b690635d4719214892855b79ce018d4b1672ac96 |
| linux | linux | >= 539dda3c5d190c5088b5e57944b1b482fcb464de < 8b841fd529db9faf8bc678d429d4bf4e98b10900 | 8b841fd529db9faf8bc678d429d4bf4e98b10900 |
| linux | linux | >= 539dda3c5d190c5088b5e57944b1b482fcb464de < 89764cf44544e943230f5e03b8c40a90da26537c | 89764cf44544e943230f5e03b8c40a90da26537c |
| linux | linux | >= 539dda3c5d190c5088b5e57944b1b482fcb464de < c18493f750208eb4ff1198fc5a02786b8b2d70a6 | c18493f750208eb4ff1198fc5a02786b8b2d70a6 |
| linux | linux | >= 539dda3c5d190c5088b5e57944b1b482fcb464de < 8a5752c6dcc085a3bfc78589925182e4e98468c5 | 8a5752c6dcc085a3bfc78589925182e4e98468c5 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 5.13 < 5.15.202 | 5.15.202 |
| linux | linux_kernel | >= 5.16 < 6.1.165 | 6.1.165 |
| linux | linux_kernel | >= 6.13 < 6.18.16 | 6.18.16 |
| linux | linux_kernel | >= 6.19 < 6.19.6 | 6.19.6 |
| linux | linux_kernel | >= 6.2 < 6.6.128 | 6.6.128 |
| linux | linux_kernel | >= 6.7 < 6.12.75 | 6.12.75 |
| ubuntu | linux | — | — |
| ubuntu | linux-aws | — | — |
| ubuntu | linux-aws-6.8 | — | — |
| ubuntu | linux-aws-fips | — | — |
| ubuntu | linux-azure-fips | — | — |
| ubuntu | linux-fips | — | — |
| ubuntu | linux-gcp | — | — |
| ubuntu | linux-gcp-6.8 | — | — |
| ubuntu | linux-gcp-fips | — | — |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vendor_ubuntu8.8HIGH
vendor_redhat7.0HIGH
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- RNBD block device driver;
- Ublk userspace block driver;
- Bus devices;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
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- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- ACPI drivers;
- ATM drivers;
- RNBD block device driver;
- Ublk userspace block driver;
- Bus devices;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Clocksource drivers;
- CPU idle management framework;
- Hardware crypto device drivers;
- DMA engine subsystem;
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An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- MIPS architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- ACPI drivers;
- ATM drivers;
- RNBD block device driver;
- Ublk userspace block driver;
- Bus devices;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Clocksource drivers;
- CPU idle management framework;
- Hardware crypto device drivers;
- DMA engine subsystem;
- EFI core;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- Hardware monitoring dr
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An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- MIPS architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- ACPI drivers;
- ATM drivers;
- RNBD block device driver;
- Ublk userspace block driver;
- Bus devices;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Clocksource drivers;
- CPU idle management framework;
- Hardware crypto device drivers;
- DMA engine subsystem;
- EFI core;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- Hardwar
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Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- MIPS architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- ACPI drivers;
- ATM drivers;
- RNBD block device driver;
- Ublk userspace block driver;
- Bus devices;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Clocksource drivers;
- CPU idle management framework;
- Hardware crypto device drivers;
- DMA engine subsystem;
- EFI core;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- Hardware monitoring dr
Red Hat
kernel: dpaa2-switch: validate num_ifs to prevent out-of-bounds write
vendor_redhat·2026-05-06·CVSS 7.0
CVE-2026-43205 [HIGH] kernel: dpaa2-switch: validate num_ifs to prevent out-of-bounds write
kernel: dpaa2-switch: validate num_ifs to prevent out-of-bounds write
No description is available for this CVE.
Package: kernel (Red Hat Enterprise Linux 10) - Affected
Package: kernel (Red Hat Enterprise Linux 6) - Not affected
Package: kernel (Red Hat Enterprise Linux 7) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 7) - Not affected
Package: kernel (Red Hat Enterprise Linux 8) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 8) - Not affected
Package: kernel (Red Hat Enterprise Linux 9) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 9) - Not affected
GHSA
GHSA-v2hq-m36p-4jr3: In the Linux kernel, the following vulnerability has been resolved:
dpaa2-switch: validate num_ifs to prevent out-of-bounds write
The driver obtains
ghsa_unreviewed·2026-05-06
CVE-2026-43205 GHSA-v2hq-m36p-4jr3: In the Linux kernel, the following vulnerability has been resolved:
dpaa2-switch: validate num_ifs to prevent out-of-bounds write
The driver obtains
In the Linux kernel, the following vulnerability has been resolved:
dpaa2-switch: validate num_ifs to prevent out-of-bounds write
The driver obtains sw_attr.num_ifs from firmware via dpsw_get_attributes()
but never validates it against DPSW_MAX_IF (64). This value controls
iteration in dpaa2_switch_fdb_get_flood_cfg(), which writes port indices
into the fixed-size cfg->if_id[DPSW_MAX_IF] array. When firmware reports
num_ifs >= 64, the loop can write past the array bounds.
Add a bound check for num_ifs in dpaa2_switch_init().
dpaa2_switch_fdb_get_flood_cfg() appends the control interface (port
num_ifs) after all matched ports. When num_ifs == DPSW_MAX_IF and all
ports match the flood filter, the loop fills all 64 slots and the control
interface write overflows by one entry.
The check u
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/89764cf44544e943230f5e03b8c40a90da26537chttps://git.kernel.org/stable/c/8a5752c6dcc085a3bfc78589925182e4e98468c5https://git.kernel.org/stable/c/8b841fd529db9faf8bc678d429d4bf4e98b10900https://git.kernel.org/stable/c/a26dda3bae469c8e4e1b1993ad33dafa32d0fc28https://git.kernel.org/stable/c/a3034a8d56174dd6464c46823438f25797910a8dhttps://git.kernel.org/stable/c/b690635d4719214892855b79ce018d4b1672ac96https://git.kernel.org/stable/c/c18493f750208eb4ff1198fc5a02786b8b2d70a6
2026-05-06
Published