Common Weakness Enumeration
CWE-835
AllowedLoop with Unreachable Exit Condition ('Infinite Loop')
Abstraction: Base · Status: Incomplete
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.
1293 vulnerabilities reference this CWE, most recent first.
CVE-2026-15923 (GCVE-0-2026-15923)
Vulnerability from cvelistv5 – Published: 2026-09-14 16:12 – Updated: 2026-09-14 19:40
VLAI
EPSS
VEX
Title
Infinite loop denial of service in Zephyr SDIO byte-I/O from a card-supplied zero max_blk_size
Summary
The Zephyr SDIO subsystem function sdio_io_rw_extended_helper() in subsys/sd/sdio.c finishes transfers with a byte-I/O loop that uses size = MIN(remaining, func->cis.max_blk_size) as the per-iteration step. The value func->cis.max_blk_size is decoded directly from the SDIO card's CIS FUNCE tuple in sdio_decode_cis() and is not validated. When a card reports a maximum block size of zero, size is always 0, remaining never decreases, and the loop spins forever.
The loop is reached from the public SDIO client API used by drivers, including sdio_read_fifo(), sdio_write_fifo(), and the incrementing register read/write helpers, each of which enters the loop while holding the per-card mutex func->card->lock. A card advertising max_blk_size == 0 therefore hangs the calling thread permanently on its first non-block-aligned transfer and never releases the mutex, denying service to the SDIO peripheral (and any subsystem such as Wi-Fi that depends on it) until the device is reset.
The malicious value must come from the SDIO card itself, so the defect is exploitable where a removable SDIO/combo card slot lets an attacker insert a crafted or malfunctioning card (a physical attack vector); on boards with a soldered SDIO peripheral it is not attacker-influenceable. There is no memory-safety, confidentiality, or integrity impact — only a permanent availability loss. The fix returns -EIO when func->cis.max_blk_size is zero, before the loop is entered.
Severity
4.6 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-14 19:39 UTC
CWE
- CWE-835 - dos
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| zephyrproject | zephyr |
Affected:
3.6.0 , < 4.4.2
(semver)
|
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CVE-2026-15163 (GCVE-0-2026-15163)
Vulnerability from cvelistv5 – Published: 2026-07-08 20:50 – Updated: 2026-07-09 13:49
VLAI
EPSS
VEX
Title
Loop with Unreachable Exit Condition ('Infinite Loop') in Wireshark
Summary
Multiple protocol dissector infinite loops in Wireshark 4.6.0 to 4.6.6 and 4.4.0 to 4.4.16 allow denial of service
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-09 13:49 UTC
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wireshark Foundation | Wireshark |
Affected:
4.6.0 , < 4.6.7
(semver)
Affected: 4.4.0 , < 4.4.17 (semver) |
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CVE-2026-14258 (GCVE-0-2026-14258)
Vulnerability from cvelistv5 – Published: 2026-07-01 09:24 – Updated: 2026-08-12 15:49
VLAI
EPSS
VEX
Title
Dhcpcd: dhcpcd infinite loop and out-of-bounds read via zero-length ipv6 nd option in router advertisement handling
Summary
A flaw was found in dhcpcd's IPv6 Neighbor Discovery Router Advertisement processing. A specially crafted IPv6 Router Advertisement containing a zero-length Neighbor Discovery option can bypass validation during packet storage and later be reparsed without adequate validation, causing the parser to enter a non-advancing loop. Successful exploitation may result in excessive CPU consumption, leading to a denial of service.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-01 12:20 UTC
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:54210 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2026-14258 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2462305 | issue-trackingx_refsource_REDHAT |
| https://github.com/NetworkConfiguration/dhcpcd/co… | |
| https://github.com/NetworkConfiguration/dhcpcd/is… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:10.0.6-11.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
Date Public
2024-12-01 00:00
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CVE-2026-13401 (GCVE-0-2026-13401)
Vulnerability from cvelistv5 – Published: 2026-07-16 16:14 – Updated: 2026-07-17 12:51
VLAI
EPSS
VEX
Title
XML::Bare versions through 0.53 for Perl will hang in an infinite loop when parsing malformed attributes
Summary
XML::Bare versions through 0.53 for Perl will hang in an infinite loop when parsing malformed attributes.
The parserc_parse function never advances the attribute-parse state cursor on certain malformed attribute forms, looping forever.
Nameless attributes such as "<a ='c'>" or unbalanced quotes "<a b='''''''c'>" can trigger this condition.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-17 12:51 UTC
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
3 references
Impacted products
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CVE-2026-13397 (GCVE-0-2026-13397)
Vulnerability from cvelistv5 – Published: 2026-07-16 16:14 – Updated: 2026-07-17 13:30
VLAI
EPSS
VEX
Title
HTML::Bare versions through 0.04 for Perl will hang in an infinite loop when parsing malformed attributes
Summary
HTML::Bare versions through 0.04 for Perl will hang in an infinite loop when parsing malformed attributes.
The parserc_parse function never advances the attribute-parse state cursor on certain malformed attribute forms, looping forever.
Nameless attributes such as "<a ='c'>" or unbalanced quotes "<a b='''''''c'>" can trigger this condition.
Note that the latest version available on CPAN is version 0.02. Newer versions are available on the git repository.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-17 13:29 UTC
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| CODECHILD | HTML::Bare |
Affected:
0 , ≤ 0.04
(custom)
|
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CVE-2026-13002 (GCVE-0-2026-13002)
Vulnerability from cvelistv5 – Published: 2026-08-14 15:02 – Updated: 2026-08-31 17:38
VLAI
EPSS
VEX
Title
Dnsmasq: infinite loop dos in dnssec nsec/nsec3 type bitmap parsing
Summary
A flow has been identified into dnssec.c library, causing an infinite loop to dnsmasq service. An attacker who controls any DNSSEC-signed zone can hang the dnsmasq process with a single crafted response, killing all DNS resolution for its clients.
Severity
4.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 16:08 UTC
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-13002 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2486360 | issue-trackingx_refsource_REDHAT |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
Date Public
2026-06-08 12:00
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CVE-2026-12629 (GCVE-0-2026-12629)
Vulnerability from cvelistv5 – Published: 2026-08-17 16:18 – Updated: 2026-08-17 18:27
VLAI
EPSS
VEX
Title
PL011 UART error interrupts never cleared, enabling an external-peer interrupt-storm denial of service
Summary
The ARM PL011 UART driver in drivers/serial/uart_pl011.c fails to acknowledge receive error interrupts. On the PL011, the framing, parity, break, and overrun error interrupts (PL011_IMSC_ERROR_MASK) are cleared only by writing the interrupt-clear register UARTICR; reading the data register clears the RX interrupt and the per-byte RSR status but not the error interrupt status in MIS. The interrupt service routine pl011_isr() acknowledged only the CTS modem-status interrupt and never wrote icr for the error bits, so an asserted error interrupt remains pending after the ISR returns.
When an application enables error-interrupt reporting via the public uart_irq_err_enable() API, an attacker who controls the serial peer can deterministically assert these error bits by injecting line errors on the RX line — a baud/stop-bit mismatch or mid-character break (framing/break error), a flipped parity bit (parity error), or FIFO flooding (overrun error). Because the error interrupt is never cleared, the interrupt line stays asserted and the CPU re-enters pl011_isr() immediately and indefinitely, producing an interrupt-storm livelock from which the core makes no forward progress.
The impact is an availability-only denial of service (permanent hang), reachable from an external or removable UART peer. Exploitation is gated by configuration: the error interrupt is off by default and no in-tree subsystem enables it, so only applications that explicitly call uart_irq_err_enable() on a PL011-based, interrupt-driven port are affected. The fix makes pl011_isr() acknowledge the pending error bits via uart->icr, breaking the loop, and additionally clears the latched RSR status in pl011_err_check().
Severity
4.6 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-17 18:26 UTC
CWE
- CWE-835 - dos
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| zephyrproject | zephyr |
Affected:
1.14.0 , < 4.4.2
(semver)
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CVE-2026-12236 (GCVE-0-2026-12236)
Vulnerability from cvelistv5 – Published: 2026-08-13 17:19 – Updated: 2026-08-13 17:58
VLAI
EPSS
VEX
Title
Infinite loop (DoS) in Bluetooth GATT client parsing of Read-By-Type responses with zero data length
Summary
The Bluetooth host GATT client function parse_read_std_char_desc() in subsys/bluetooth/host/gatt.c parses an ATT Read By Type Response received from a remote GATT server during BT_GATT_DISCOVER_STD_CHAR_DESC discovery. The per-entry stride rsp->len is taken directly from the peer's PDU, and the parse loop both tests its exit condition (length >= rsp->len) and advances (length -= rsp->len, pdu += rsp->len) using that value. The minimum value of rsp->len was never validated before the loop.
A malicious or malfunctioning peer can reply with rsp->len = 0. Because length is unsigned and never decreases, the loop condition stays true forever and the read pointer never advances; as long as the body is at least a few bytes with a non-zero handle and a matching descriptor UUID, the host repeatedly re-parses the same bytes and invokes the discovery callback, never terminating. This hangs the Bluetooth host processing thread (CWE-835, loop with unreachable exit condition).
The condition is reachable by any connected peer once the local device initiates standard-descriptor-value discovery; GATT discovery does not require bonding or encryption, so an unauthenticated adjacent attacker that the device connects to can trigger it. The impact is denial of service of the Bluetooth subsystem (and likely a watchdog reset on constrained targets); there is no memory disclosure or corruption.
The fix adds a rsp->len < sizeof(struct bt_att_data) check before the loop, rejecting under-length responses so the stride is always non-zero and the loop terminates. The sibling parsers parse_include() and parse_characteristic() already validated rsp->len and are unaffected.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 17:58 UTC
CWE
- CWE-835 - dos
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| zephyrproject | zephyr |
Affected:
2.6.0 , < 4.4.2
(semver)
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CVE-2026-11932 (GCVE-0-2026-11932)
Vulnerability from cvelistv5 – Published: 2026-08-12 20:13 – Updated: 2026-08-14 18:29
VLAI
EPSS
VEX
Title
Security vulnerabilities have been found in IBM Verify Identity Access and IBM Security Verify Access
Summary
IBM Security Verify Access 10.0 through 10.0.9.2 and IBM Verify Identity Access 11.0 through 11.0.3 and IBM Verify Identity Access Container 11.0 through 11.0.3 is vulnerable to a denial of service attack.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 13:47 UTC
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.ibm.com/support/pages/node/7283079 | vendor-advisorypatch |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| IBM | Security Verify Access |
Affected:
10.0 , ≤ 10.0.9.2
(semver)
cpe:2.3:a:ibm:security_verify_access:10.0:*:*:*:*:*:*:* cpe:2.3:a:ibm:security_verify_access:10.0.0:*:*:*:*:*:*:* cpe:2.3:a:ibm:security_verify_access:10.0.9.2:*:*:*:*:*:*:* |
|
| IBM | Verify Identity Access |
Affected:
11.0 , ≤ 11.0.3
(semver)
cpe:2.3:a:ibm:verify_identity_access:11.0:*:*:*:*:*:*:* cpe:2.3:a:ibm:verify_identity_access:11.0.0:*:*:*:*:*:*:* cpe:2.3:a:ibm:verify_identity_access:11.0.3:*:*:*:*:*:*:* |
|
| IBM | Verify Identity Access Container |
Affected:
11.0 , ≤ 11.0.3
(semver)
cpe:2.3:a:ibm:verify_identity_access_container:11.0:*:*:*:*:*:*:* cpe:2.3:a:ibm:verify_identity_access_container:11.0.0:*:*:*:*:*:*:* cpe:2.3:a:ibm:verify_identity_access_container:11.0.3:*:*:*:*:*:*:* |
|
| IBM | Security Verify Access Container |
Affected:
10.0 , ≤ 10.0.9.2
(semver)
cpe:2.3:a:ibm:security_verify_access_container:10.0:*:*:*:*:*:*:* cpe:2.3:a:ibm:security_verify_access_container:10.0.0:*:*:*:*:*:*:* cpe:2.3:a:ibm:security_verify_access_container:10.0.9.2:*:*:*:*:*:*:* |
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CVE-2026-11352 (GCVE-0-2026-11352)
Vulnerability from cvelistv5 – Published: 2026-07-03 06:12 – Updated: 2026-09-15 06:02
VLAI
EPSS
VEX
Title
QUIC zero-length UDP datagrams busy-loop
Summary
An issue in curl’s QUIC UDP receive function allows a malicious HTTP/3 server
to trigger a remote denial of service against a curl or libcurl client.
Because the helper function discards zero-length UDP datagrams before counting
them toward the per-call packet budget, a connected QUIC peer can continuously
stream empty datagrams to indefinitely stall the client.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-06 18:26 UTC
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
Impacted products
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No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.