01 Record

CVE-2026-23457

netfilter: nf_conntrack_sip: fix Content-Length u32 truncation in sip_help_tcp()

HighPUBLISHEDCNA: Linux

CNA base score8.6 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

View raw JSON

02 Description

netfilter: nf_conntrack_sip: fix Content-Length u32 truncation in sip_help_tcp()

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.43% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 37.3% of scored records. A rank, not a probability.

NVD base score

8.6 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-10-19.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-04-03 15:15Z6 MO AGO

Last updated

2026-10-19 18:35Z10 DAYS AGO

Reserved

2026-01-13

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 8.6)

CNA CVSS vector

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

Weaknesses

CWE-190Integer Overflow or WraparoundBase

Data version

5.2

Document digest

f6c98535f7d71c4f5f109eec5912e6833d65325b646461273c17241ddf041427

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxf5b321bd37fbec9188feb1f721ab46a5ac0b35da to < ed81b6a7012485acdb9c6c80735a0b7d8e5e1873, f5b321bd37fbec9188feb1f721ab46a5ac0b35da to < cd1b7403ec835f8a0b3f1f7e68ac26af2cb1e42f, f5b321bd37fbec9188feb1f721ab46a5ac0b35da to < b75209debb9adab287b3caa982f77788c1e15027, f5b321bd37fbec9188feb1f721ab46a5ac0b35da to < 528b4509c9dfc272e2e92d811915e5211650d383, f5b321bd37fbec9188feb1f721ab46a5ac0b35da to < 75fcaee5170e7dbbee778927134ef2e9568b4659, f5b321bd37fbec9188feb1f721ab46a5ac0b35da to < 865dba58958c3a86786f89a501971ab0e3ec6ba9, f5b321bd37fbec9188feb1f721ab46a5ac0b35da to < d4f17256544cc37f6534a14a27a9dec3540c2015, f5b321bd37fbec9188feb1f721ab46a5ac0b35da to < fbce58e719a17aa215c724473fd5baaa4a8dc57c, 2.6.34—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/ed81b6a7012485acdb9c6c80735a0b7d8e5e1873
git.kernel.orghttps://git.kernel.org/stable/c/cd1b7403ec835f8a0b3f1f7e68ac26af2cb1e42f
git.kernel.orghttps://git.kernel.org/stable/c/b75209debb9adab287b3caa982f77788c1e15027
git.kernel.orghttps://git.kernel.org/stable/c/528b4509c9dfc272e2e92d811915e5211650d383
git.kernel.orghttps://git.kernel.org/stable/c/75fcaee5170e7dbbee778927134ef2e9568b4659
git.kernel.orghttps://git.kernel.org/stable/c/865dba58958c3a86786f89a501971ab0e3ec6ba9
git.kernel.orghttps://git.kernel.org/stable/c/d4f17256544cc37f6534a14a27a9dec3540c2015
git.kernel.orghttps://git.kernel.org/stable/c/fbce58e719a17aa215c724473fd5baaa4a8dc57c
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-082556.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-019113.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-457936.html

07 Fixed in

Debian 12

linux
Fixed in 6.1.170-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.12.85-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 6.19.10-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.