Bluetooth: L2CAP: Fix u8 overflow
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix u8 overflow By keep sending L2CAP_CONF_REQ packets, chan->num_conf_rsp increases multiple times and eventually it will wrap around the maximum number (i.e., 255). This patch prevents this by adding a boundary check with L2CAP_MAX_CONF_RSP Btmon log: Bluetooth monitor ver 5.64 = Note: Linux version 6.1.0-rc2 (x86_64) 0.264594 = Note: Bluetooth subsystem version 2.22 0.264636 @ MGMT Open: btmon (privileged) version 1.22 {0x0001} 0.272191 = New Index: 00:00:00:00:00:00 (Primary,Virtual,hci0) [hci0] 13.877604 @ RAW Open: 9496 (privileged) version 2.22 {0x0002} 13.890741 = Open Index: 00:00:00:00:00:00 [hci0] 13.900426 (...) > ACL Data RX: Handle 200 flags 0x00 dlen 1033 #32 [hci0] 14.273106 invalid packet size (12 != 1033) 08 00 01 00 02 01 04 00 01 10 ff ff ............ > ACL Data RX: Handle 200 flags 0x00 dlen 1547 #33 [hci0] 14.273561 invalid packet size (14 != 1547) 0a 00 01 00 04 01 06 00 40 00 00 00 00 00 ........@..... > ACL Data RX: Handle 200 flags 0x00 dlen 2061 #34 [hci0] 14.274390 invalid packet size (16 != 2061) 0c 00 01 00 04 01 08 00 40 00 00 00 00 00 00 04 ........@....... > ACL Data RX: Handle 200 flags 0x00 dlen 2061 #35 [hci0] 14.274932 invalid packet size (16 != 2061) 0c 00 01 00 04 01 08 00 40 00 00 00 07 00 03 00 ........@....... = bluetoothd: Bluetooth daemon 5.43 14.401828 > ACL Data RX: Handle 200 flags 0x00 dlen 1033 #36 [hci0] 14.275753 invalid packet size (12 != 1033) 08 00 01 00 04 01 04 00 40 00 00 00 ........@...
- Published
- Oct 21, 2024
- Updated
- Jun 17, 2026
- EPSS
- 0.2% · 15th percentile
- CWE
- CWE-190
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Report tools
Action score
22
Monitor
Low priority for now.
- CVSS
- 22 / 40 · 5.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernelbefore 4.9.337
- linux linux kernel4.10 and later · before 4.14.303
- linux linux kernel4.15 and later · before 4.19.270
- linux linux kernel4.20 and later · before 5.4.229
- linux linux kernel5.5 and later · before 5.10.161
- linux linux kernel5.11 and later · before 5.15.85
- linux linux kernel5.16 and later · before 6.0.15
- linux linux kernel6.1
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
- 2.6.32affected
- f2fcfcd670257236ebf2088bbdf26f6a8ef459fe and later · before 49d5867819ab7c744852b45509e8469839c07e0eaffected · git
- f2fcfcd670257236ebf2088bbdf26f6a8ef459fe and later · before 95f1847a361c7b4bf7d74c06ecb6968455082c1aaffected · git
- f2fcfcd670257236ebf2088bbdf26f6a8ef459fe and later · before ad528fde0702903208d0a79d88d5a42ae3fc235baffected · git
- f2fcfcd670257236ebf2088bbdf26f6a8ef459fe and later · before 9fdc79b571434af7bc742da40a3405f038b637a7affected · git
- f2fcfcd670257236ebf2088bbdf26f6a8ef459fe and later · before f3fe6817156a2ad4b06f01afab04638a34d7c9a6affected · git
- f2fcfcd670257236ebf2088bbdf26f6a8ef459fe and later · before 19a78143961a197de8502f4f29c453b913dc3c29affected · git
- f2fcfcd670257236ebf2088bbdf26f6a8ef459fe and later · before 5550bbf709c323194881737fd290c4bada9e6eadaffected · git
- f2fcfcd670257236ebf2088bbdf26f6a8ef459fe and later · before bcd70260ef56e0aee8a4fc6cd214a419900b0765affected · git
- before 2.6.32not affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 6.1.4-1 | 6.1.4-1 |
| Red Hat:enterprise_linux:8::baseos | bpftool | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
| Red Hat:enterprise_linux:8::baseos | bpftool-debuginfo | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
| Red Hat:enterprise_linux:8::baseos | kernel | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
| Red Hat:enterprise_linux:8::baseos | kernel-abi-stablelists | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
| Red Hat:enterprise_linux:8::baseos | kernel-core | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
| Red Hat:enterprise_linux:8::baseos | kernel-debug | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
| Red Hat:enterprise_linux:8::baseos | kernel-debug-core | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
| Red Hat:enterprise_linux:8::baseos | kernel-debug-debuginfo | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
| Red Hat:enterprise_linux:8::baseos | kernel-debug-devel | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
| Red Hat:enterprise_linux:8::baseos | kernel-debug-modules | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
| Red Hat:enterprise_linux:8::baseos | kernel-debug-modules-extra | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
| Red Hat:enterprise_linux:8::baseos | kernel-debuginfo | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
| Red Hat:enterprise_linux:8::baseos | kernel-debuginfo-common-aarch64 | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
| Red Hat:enterprise_linux:8::baseos | kernel-debuginfo-common-ppc64le | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
| Red Hat:enterprise_linux:8::baseos | kernel-debuginfo-common-s390x | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
| Red Hat:enterprise_linux:8::baseos | kernel-debuginfo-common-x86_64 | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
| Red Hat:enterprise_linux:8::baseos | kernel-devel | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
| Red Hat:enterprise_linux:8::baseos | kernel-doc | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
| Red Hat:enterprise_linux:8::baseos | kernel-modules | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
| Red Hat:enterprise_linux:8::baseos | kernel-modules-extra | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
| Red Hat:enterprise_linux:8::baseos | kernel-tools | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
| Red Hat:enterprise_linux:8::baseos | kernel-tools-debuginfo | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
| Red Hat:enterprise_linux:8::baseos | kernel-tools-libs | before 0:4.18.0-553.el8_10 | 0:4.18.0-553.el8_10 |
+96
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
- CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV83Now
- CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV77This week
- CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV77This week
- CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV77This week
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 19a78143961a197de8502f4f29c453b913dc3c29 | Vendor (CNA) |
| Linux Linux | 49d5867819ab7c744852b45509e8469839c07e0e | Vendor (CNA) |
| Linux Linux | 5550bbf709c323194881737fd290c4bada9e6ead | Vendor (CNA) |
| Linux Linux | 95f1847a361c7b4bf7d74c06ecb6968455082c1a | Vendor (CNA) |
| Linux Linux | 9fdc79b571434af7bc742da40a3405f038b637a7 | Vendor (CNA) |
| Linux Linux | ad528fde0702903208d0a79d88d5a42ae3fc235b | Vendor (CNA) |
| Linux Linux | bcd70260ef56e0aee8a4fc6cd214a419900b0765 | Vendor (CNA) |
| Linux Linux | f3fe6817156a2ad4b06f01afab04638a34d7c9a6 | Vendor (CNA) |
| debian:linux | 6.1.4-1 · Debian:12 | Package registry (OSV) |
| opensuse:kernel-azure | 5.14.21-150500.33.72.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| opensuse:kernel-rt | 5.14.21-150500.13.76.1 · openSUSE:Leap Micro 5.5 | Package registry (OSV) |
| opensuse:kernel-source-azure | 5.14.21-150500.33.72.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| opensuse:kernel-syms-azure | 5.14.21-150500.33.72.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| red hat:bpftool-debuginfo | 0:7.3.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-debug-debuginfo | 0:5.14.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-debug-devel | 0:5.14.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-debug-devel-matched | 0:5.14.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-debuginfo | 0:5.14.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-devel | 0:5.14.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-devel-matched | 0:5.14.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-debug-debuginfo | 0:5.14.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-debug-devel | 0:5.14.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-debug-devel-matched | 0:5.14.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-debuginfo | 0:5.14.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-debuginfo-common-aarch64 | 0:5.14.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| rocky linux:kernel | 0:4.18.0-553.123.1.el8_10.cloud.0.1 · Rocky Linux:8 | Package registry (OSV) |
| suse:kernel-azure | 5.14.21-150500.33.72.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP5 | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP5-RT_Update_22 | 1-150500.11.3.1 · SUSE:Linux Enterprise Live Patching 15 SP5 | Package registry (OSV) |
| suse:kernel-rt | 5.14.21-150500.13.76.1 · SUSE:Linux Enterprise Micro 5.5 | Package registry (OSV) |
| suse:kernel-rt_debug | 5.14.21-150500.13.76.1 · SUSE:Real Time Module 15 SP5 | Package registry (OSV) |
+4
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.
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.
Credits
All researchersFinders, 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.
- CVE-2022-490300 days apartlibbpf: Handle size overflow for ringbuf mmap31Monitor
- CVE-2024-4213683 days apartcdrom: rearrange last_media_change check to avoid unintentional overflow31Monitor
- CVE-2022-4883797 days apartusb: gadget: rndis: prevent integer overflow in rndis_set_response()31Monitor
- CVE-2024-40994101 days apartptp: fix integer overflow in max_vclocks_store31Monitor
- CVE-2024-41000101 days apartblock/ioctl: prefer different overflow check31Monitor
- CVE-2021-47098231 days aparthwmon: (lm90) Prevent integer overflow/underflow in hysteresis calculations31Monitor
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
- none
- 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
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-190 · Integer Overflow or WraparoundCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/stable/c/19a78143961a197de8502f4f29c453b913dc3c29
- git.kernel.org/stable/c/49d5867819ab7c744852b45509e8469839c07e0e
- git.kernel.org/stable/c/5550bbf709c323194881737fd290c4bada9e6ead
- git.kernel.org/stable/c/95f1847a361c7b4bf7d74c06ecb6968455082c1a
- git.kernel.org/stable/c/9fdc79b571434af7bc742da40a3405f038b637a7
- git.kernel.org/stable/c/ad528fde0702903208d0a79d88d5a42ae3fc235b
- git.kernel.org/stable/c/bcd70260ef56e0aee8a4fc6cd214a419900b0765
- git.kernel.org/stable/c/f3fe6817156a2ad4b06f01afab04638a34d7c9a6
Vendor advisories and official records. Exploit/PoC links are deliberately left out.