CVE-2026-53002netfilter: conntrack: remove sprintf usage
- 9.8CriticalCVSS base score
- 0.37%Exploitation in 30 daysEPSS · top 69% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: remove sprintf usage Replace it with scnprintf, the buffer sizes are expected to be large enough to hold the result, no need for snprintf+overflow check. Increase buffer size in mangle_content_len() while at it. BUG: KASAN: stack-out-of-bounds in vsnprintf+0xea5/0x1270 Write of size 1 at addr [..] vsnprintf+0xea5/0x1270 sprintf+0xb1/0xe0 mangle_content_len+0x1ac/0x280 nf_nat_sdp_session+0x1cc/0x240 process_sdp+0x8f8/0xb80 process_invite_request+0x108/0x2b0 process_sip_msg+0x5da/0xf50 sip_help_tcp+0x45e/0x780 nf_confirm+0x34d/0x990 [..]
Timeline
ID reserved
By Linux
- 15 days later
· 15 days later
Published
- 5 months later
· 5 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| redhat-SADPADP (enrichment) | 3.1 | High7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.37% · top 69% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected 9fafcd7b203229c3f3893a475741afc27e276306 – < 2f793ba78470a99f40389b7dc60a81d9f5ad3956
- affected 9fafcd7b203229c3f3893a475741afc27e276306 – < 6bbf829b4c1b44c941c47dd0d710f1393258f3d5
- affected 9fafcd7b203229c3f3893a475741afc27e276306 – < ab64e61c9323fa6de21bd20da1ddb29a0fb65d34
- affected 9fafcd7b203229c3f3893a475741afc27e276306 – < 1c9fb8aeed06790d42cdcd00f6c3ce0b9e926c1e
- affected 9fafcd7b203229c3f3893a475741afc27e276306 – < a8e0a32a23d3f34862af3b4da792ecb3a891a9a3
- affected 9fafcd7b203229c3f3893a475741afc27e276306 – < 8e3be0d12615a173fe260cd42753ca7a001acbf2
- affected 9fafcd7b203229c3f3893a475741afc27e276306 – < c08ff52e44945e6ef4ce0790f49ea761b060c45b
- affected 9fafcd7b203229c3f3893a475741afc27e276306 – < 6e7066bdb481a87fe88c4fa563e348c03b2d373d
- affected 2.6.20
- unaffected < 2.6.20
- unaffected 5.10.258 – ≤ 5.10.*
- unaffected 5.15.209 – ≤ 5.15.*
- unaffected 6.1.175 – ≤ 6.1.*
- unaffected 6.6.141 – ≤ 6.6.*
- unaffected 6.12.91 – ≤ 6.12.*
- unaffected 6.18.33 – ≤ 6.18.*
- unaffected 7.0.10 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References16
- https://git.kernel.org/stable/c/2f793ba78470a99f40389b7dc60a81d9f5ad3956 (opens in a new tab)
- https://git.kernel.org/stable/c/6bbf829b4c1b44c941c47dd0d710f1393258f3d5 (opens in a new tab)
- https://git.kernel.org/stable/c/ab64e61c9323fa6de21bd20da1ddb29a0fb65d34 (opens in a new tab)
- https://git.kernel.org/stable/c/1c9fb8aeed06790d42cdcd00f6c3ce0b9e926c1e (opens in a new tab)
- https://git.kernel.org/stable/c/a8e0a32a23d3f34862af3b4da792ecb3a891a9a3 (opens in a new tab)
- https://git.kernel.org/stable/c/8e3be0d12615a173fe260cd42753ca7a001acbf2 (opens in a new tab)
- https://git.kernel.org/stable/c/c08ff52e44945e6ef4ce0790f49ea761b060c45b (opens in a new tab)
- https://git.kernel.org/stable/c/6e7066bdb481a87fe88c4fa563e348c03b2d373d (opens in a new tab)
- https://access.redhat.com/security/cve/CVE-2026-53002 (opens in a new tab)vdb-entryx_refsource_REDHAT
- RHBZ#2492329 (opens in a new tab)issue-trackingx_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53002.json (opens in a new tab)x_sadp-csaf-vex
- https://access.redhat.com/errata/RHSA-2026:66180 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:66000 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:64770 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-38870 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-53002)Record last updated .