CVE-2026-33845 @ morris

"CVE-2026-33845"
"gnutls-3.3.29-9.el7_6.tuxcare.els5)"
"Am I vulnerable?"

Status

does_not_affect

Priority

6.56

Match score

3.0

Risk

InfoLeak MemCorrupt DoS

CVSS

7.5 HIGH

Reason

cpe: gnutls; pkgs: gnutls; version: unknown (gnutls-3.3.29-9.el7_6.tuxcare.els5); risk:info_disclosure

Created

2026-08-03T02:36:08Z

Updated

2026-08-22T10:17:50Z

Closed

2026-08-03T19:24:47Z

Package interrogation (copy)

Run on the host — click to copy a command. RPM

Package	Commands
gnutls-3.3.29-9.el7_6.tuxcare.els5)

Inventory lookup

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Same product CVEs in your queue

Other tickets that look like the same product (from match reason). Relate them here to triage this CVE as the primary.

CVE	CVSS	Systems	Status	Matched	Already related
CVE-2026-1584	7.5	Library, Saiph, morris, mufasa	new	gnutls	—
CVE-2026-42009	7.5	Library, Matrix, Saiph, morris, mufasa	not_applicable	gnutls	→ CVE-2026-42010
CVE-2026-42010	7.1	Library, Matrix, Saiph, morris, mufasa	not_applicable	gnutls	—

Related CVE (same fix)

Point this ticket’s CVE at a higher-priority / same-fix primary so you only triage one.

Host OS / kernel

CloudLinux release 7.9 (Boris Yegorov) (7.9) · cloudlinux

Arch

x86_64

kernel_release

uname -r → 3.10.0-962.3.2.lve1.5.89.el7.x86_64

kernel_version

uname -v → #1 SMP Thu Jul 9 15:55:31 UTC 2026

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Same CVE on other hosts

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System	Status	Priority	Updated
mufasa	does_not_affect	6.56	2026-08-22T10:17:50Z	Open
Library	accepted_risk	1.97	2026-08-22T10:17:50Z	Open
Saiph	accepted_risk	0.98	2026-08-22T10:17:50Z	Open

Description

A flaw in GnuTLS DTLS handshake parsing allows malformed fragments with zero length and non-zero offset, leading to an integer underflow during reassembly and resulting in an out-of-bounds read. This issue is remotely exploitable and may cause information disclosure or denial of service.

Determination

Remotely exploitable flaw in GnuTLS DTLS handshake parsing. 
Malformed fragments with zero length and a non-zero offset can cause an integer underflow during reassembly, leading to an out-of-bounds read (DoS or potential information disclosure).
rpm -q --changelog gnutls | grep -i -A5 -B5 "33845\|DTLS\|underflow\|OOB"
Confirms fix is in place.

Update status

Add note only

Mitigation log

2026-08-03T03:09:48Z — affects

Remotely exploitable flaw in GnuTLS DTLS handshake parsing. Malformed fragments with zero length and a non-zero offset can cause an integer underflow during reassembly, leading to an out-of-bounds read (DoS or potential information disclosure).

2026-08-03T03:10:27Z

Your package is built on the older el7_6 base (with els4). There is no public advisory confirming that the fix for CVE-2026-33845 was included in the el7_6.tuxcare.els4 rebuild. Conclusion: Your current package does not appear to contain the fix and should be treated as vulnerable. Recommendation Update to a newer TuxCare/CloudLinux GnuTLS package that is based on the fixed el7_9 (or later) series: Bash yum update gnutls

2026-08-03T19:20:37Z

How an attacker would exploit it (high-level) Find a vulnerable service The target must be running a network service that uses GnuTLS and speaks DTLS (TLS over UDP). Common examples include certain VPN implementations, media/streaming servers, VoIP-related services, or custom applications that use DTLS.

2026-08-03T19:24:47Z — does_not_affect

rpm -q --changelog gnutls | grep -i -A5 -B5 "33845\|DTLS\|underflow\|OOB" Confirms fix is in place.

References

NVD: CVE-2026-33845