CVE-2026-5435Disclosure(gnu / glibc)

LOWCVSS 7.3 · HIGH

Signal is active with 2 mentions in latest observed window

Immediate actions

Patch gnu glibc systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

The deprecated functions ns_printrrf, ns_printrr and fp_nquery in the GNU C Library version 2.2 and newer fail to enforce the caller-supplied buffer length, and can result in an out-of-bounds write when printing TSIG records.

gnu CVEs Back to dashboard

0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories

https://inbox.sourceware.org/libc-announce/[email protected]/T/#u

Other references

Weakness type (CWE)

CWE-787

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

glibc

Threat summary

Patch or workaround signal is available
2 mentions across 1 observed day

What's happening

Patch or workaround mentioned in 1 signal
Technical details provided in 2 signals
Disclosure: 1 classified signal
2 total mentions across 1 day

Affected systems

Vendors

gnu

Products

glibc

Deep dive

Activity timeline2 mentions / 1d

Signal classification2 categories

Disclosure

150.0%

Patch

150.0%

Referenced assets2 URLs

By indicator

Full discourse2 posts

Open Source Security mailing list@oss_security162d
Disclosure
2 new glibc security advisories https://www.openwall.com/lists/oss-security/2026/04/28/16 GLIBC-SA-2026-0011,CVE-2026-5435: Potential buffer overflow in ns_sprintrrf TSIG handling path GLIBC-SA-2026-0012,CVE-2026-6238: Buffer overread in ns_printrrf with corrupted RDATA field
Post summary
The text announces two new glibc security advisories that identify potential buffer overflow and buffer overread vulnerabilities in specific functions, but provides no details on exploits, patches, or active exploitation.
010102549
4.7K followersView on X
Gray Hats@the_yellow_fall162d
Patch
glibc warns of critical flaws (CVE-2026-5435 & CVE-2026-6238) in deprecated DNS functions. Patch legacy apps to avoid buffer overflows and memory leaks. #glibc #LinuxSecurity #InfoSec #CyberSecurity #BufferOverflow #LegacyCode #OpenSource #SysAdmin #Linux https://securityonline.info/glibc-legacy-dns-vulnerability-cve-2026-5435-patch-guide/ https://t.co/fZChUvri8R
Post summary
The tweet announces critical glibc DNS function vulnerabilities and directs users to patch legacy applications to prevent buffer overflows and memory leaks.
01044605
12.5K followersView on X

CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	gnu	glibc	-	-	-

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