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CVE-2022-48871· NVD / CVE Program· CNA Linux

tty: serial: qcom-geni-serial: fix slab-out-of-bounds on RX FIFO buffer

In the Linux kernel, the following vulnerability has been resolved: tty: serial: qcom-geni-serial: fix slab-out-of-bounds on RX FIFO buffer Driver's probe allocates memory for RX FIFO (port->rx_fifo) based on default RX FIFO depth, e.g. 16. Later during serial startup the qcom_geni_serial_port_setup() updates the RX FIFO depth (port->rx_fifo_depth) to match real device capabilities, e.g. to 32. The RX UART handle code will read "port->rx_fifo_depth" number of words into "port->rx_fifo" buffer, thus exceeding the bounds. This can be observed in certain configurations with Qualcomm Bluetooth HCI UART device and KASAN: Bluetooth: hci0: QCA Product ID :0x00000010 Bluetooth: hci0: QCA SOC Version :0x400a0200 Bluetooth: hci0: QCA ROM Version :0x00000200 Bluetooth: hci0: QCA Patch Version:0x00000d2b Bluetooth: hci0: QCA controller version 0x02000200 Bluetooth: hci0: QCA Downloading qca/htbtfw20.tlv bluetooth hci0: Direct firmware load for qca/htbtfw20.tlv failed with error -2 Bluetooth: hci0: QCA Failed to request file: qca/htbtfw20.tlv (-2) Bluetooth: hci0: QCA Failed to download patch (-2) ================================================================== BUG: KASAN: slab-out-of-bounds in handle_rx_uart+0xa8/0x18c Write of size 4 at addr ffff279347d578c0 by task swapper/0/0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.1.0-rt5-00350-gb2450b7e00be-dirty #26 Hardware name: Qualcomm Technologies, Inc. Robotics RB5 (DT) Call trace: dump_backtrace.part.0+0xe0/0xf0 show_stack+0x18/0x40 dump_stack_lvl+0x8c/0xb8 print_report+0x188/0x488 kasan_report+0xb4/0x100 __asan_store4+0x80/0xa4 handle_rx_uart+0xa8/0x18c qcom_geni_serial_handle_rx+0x84/0x9c qcom_geni_serial_isr+0x24c/0x760 __handle_irq_event_percpu+0x108/0x500 handle_irq_event+0x6c/0x110 handle_fasteoi_irq+0x138/0x2cc generic_handle_domain_irq+0x48/0x64 If the RX FIFO depth changes after probe, be sure to resize the buffer.

HighCVSS 7.1 · v3.1—No exploit Fix available
Published
Aug 21, 2024
Updated
Aug 5, 2026
EPSS
0.3% · 26th percentile
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JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
7.1
CNA · Linux
8.8
1.7 point gap

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel5.7 and later · before 5.10.165
  • linux linux kernel5.11 and later · before 5.15.90
  • linux linux kernel5.16 and later · before 6.1.8

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.7affected
    • f9d690b6ece7ec9a6ff6b588df95a010ab2d66f9 and later · before 894681682dbefdad917b88f86cde1069140a047aaffected · git
    • f9d690b6ece7ec9a6ff6b588df95a010ab2d66f9 and later · before cb53a3366eb28fed67850c80afa52075bb71a38aaffected · git
    • f9d690b6ece7ec9a6ff6b588df95a010ab2d66f9 and later · before fd524ca7fe45b8a06dca2dd546d62684a9768f95affected · git
    • f9d690b6ece7ec9a6ff6b588df95a010ab2d66f9 and later · before b8caf69a6946e18ffebad49847e258f5b6d52ac2affected · git
    • before 5.7not affected · semver
    • 5.10.165 and later · up to and including 5.10.*not affected · semver
    • 5.15.90 and later · up to and including 5.15.*not affected · semver
    • 6.1.8 and later · up to and including 6.1.*not affected · semver
    • 6.2 and laternot affected · original_commit_for_fix

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.8-16.1.8-1
openSUSE:Leap 15.5dtb-aarch64before 5.14.21-150500.55.80.15.14.21-150500.55.80.1
openSUSE:Leap 15.5kernel-debugbefore 5.14.21-150500.55.80.25.14.21-150500.55.80.2
openSUSE:Leap 15.5kernel-kvmsmallbefore 5.14.21-150500.55.80.25.14.21-150500.55.80.2
openSUSE:Leap 15.5kernel-obs-qabefore 5.14.21-150500.55.80.15.14.21-150500.55.80.1
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSkernel-64kbbefore 5.14.21-150400.24.133.25.14.21-150400.24.133.2
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSkernel-docsbefore 5.14.21-150400.24.133.15.14.21-150400.24.133.1
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSkernel-obs-buildbefore 5.14.21-150400.24.133.25.14.21-150400.24.133.2
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSkernel-sourcebefore 5.14.21-150400.24.133.25.14.21-150400.24.133.2
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSkernel-symsbefore 5.14.21-150400.24.133.15.14.21-150400.24.133.1
SUSE:Linux Enterprise Live Patching 15 SP4kernel-livepatch-SLE15-SP4_Update_31before 1-150400.9.3.21-150400.9.3.2
SUSE:Linux Enterprise Live Patching 15 SP5kernel-livepatch-SLE15-SP5_Update_19before 1-150500.11.3.21-150500.11.3.2
SUSE:Linux Enterprise Live Patching 15 SP5kernel-livepatch-SLE15-SP5_Update_19before 1-150500.11.3.21-150500.11.3.2
SUSE:Linux Enterprise Live Patching 15 SP5kernel-livepatch-SLE15-SP5-RT_Update_19before 1-150500.11.3.21-150500.11.3.2
SUSE:Linux Enterprise Live Patching 15 SP5kernel-livepatch-SLE15-SP5-RT_Update_19before 1-150500.11.3.21-150500.11.3.2
SUSE:Linux Enterprise Micro 5.3kernel-defaultbefore 5.14.21-150400.24.133.25.14.21-150400.24.133.2
SUSE:Linux Enterprise Micro 5.3kernel-default-basebefore 5.14.21-150400.24.133.2.150400.24.64.55.14.21-150400.24.133.2.150400.24.64.5
SUSE:Linux Enterprise Micro 5.3kernel-rtbefore 5.14.21-150400.15.91.35.14.21-150400.15.91.3
SUSE:Linux Enterprise Micro 5.3kernel-source-rtbefore 5.14.21-150400.15.91.35.14.21-150400.15.91.3
SUSE:Linux Enterprise Micro 5.5kernel-defaultbefore 5.14.21-150500.55.80.25.14.21-150500.55.80.2
SUSE:Linux Enterprise Micro 5.5kernel-defaultbefore 5.14.21-150500.55.80.25.14.21-150500.55.80.2
SUSE:Linux Enterprise Micro 5.5kernel-default-basebefore 5.14.21-150500.55.80.2.150500.6.35.65.14.21-150500.55.80.2.150500.6.35.6
SUSE:Linux Enterprise Micro 5.5kernel-default-basebefore 5.14.21-150500.55.80.2.150500.6.35.65.14.21-150500.55.80.2.150500.6.35.6
SUSE:Linux Enterprise Micro 5.5kernel-rtbefore 5.14.21-150500.13.67.35.14.21-150500.13.67.3

+26

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Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux894681682dbefdad917b88f86cde1069140a047aVendor (CNA)
Linux Linuxb8caf69a6946e18ffebad49847e258f5b6d52ac2Vendor (CNA)
Linux Linuxcb53a3366eb28fed67850c80afa52075bb71a38aVendor (CNA)
Linux Linuxfd524ca7fe45b8a06dca2dd546d62684a9768f95Vendor (CNA)
debian:linux6.1.8-1 · Debian:12Package registry (OSV)
opensuse:kernel-azure5.14.21-150500.33.66.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-rt5.14.21-150500.13.67.3 · openSUSE:Leap Micro 5.5Package registry (OSV)
opensuse:kernel-source-azure5.14.21-150500.33.66.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-syms-azure5.14.21-150500.33.66.1 · openSUSE:Leap 15.5Package registry (OSV)
suse:kernel-azure5.14.21-150500.33.66.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP5Package registry (OSV)
suse:kernel-livepatch-SLE15-SP5-RT_Update_191-150500.11.3.2 · SUSE:Linux Enterprise Live Patching 15 SP5Package registry (OSV)
suse:kernel-rt5.14.21-150500.13.67.3 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:kernel-rt_debug5.14.21-150500.13.67.3 · SUSE:Real Time Module 15 SP5Package registry (OSV)
suse:kernel-source-azure5.14.21-150500.33.66.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP5Package registry (OSV)
suse:kernel-source-rt5.14.21-150500.13.67.3 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:kernel-syms-azure5.14.21-150500.33.66.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP5Package registry (OSV)
suse:kernel-syms-rt5.14.21-150500.13.67.1 · SUSE:Real Time Module 15 SP5Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Noroxi analysis

No Noroxi analysis for this record yet

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Change log

  1. Fix✗ → ✓

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References

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