CVE-2026-53002
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.37%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 [..]
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.37% probability · 30th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- linux/linux kernel · redhat/enterprise linux
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/1c9fb8aeed06790d42cdcd00f6c3ce0b9e926c1ePatch
- https://git.kernel.org/stable/c/2f793ba78470a99f40389b7dc60a81d9f5ad3956Patch
- https://git.kernel.org/stable/c/6bbf829b4c1b44c941c47dd0d710f1393258f3d5Patch
- https://git.kernel.org/stable/c/6e7066bdb481a87fe88c4fa563e348c03b2d373dPatch
- https://git.kernel.org/stable/c/8e3be0d12615a173fe260cd42753ca7a001acbf2Patch
- https://git.kernel.org/stable/c/a8e0a32a23d3f34862af3b4da792ecb3a891a9a3Patch
- https://git.kernel.org/stable/c/ab64e61c9323fa6de21bd20da1ddb29a0fb65d34Patch
- https://git.kernel.org/stable/c/c08ff52e44945e6ef4ce0790f49ea761b060c45bPatch
- https://access.redhat.com/errata/RHSA-2026:64770
- https://access.redhat.com/errata/RHSA-2026:66000
- https://access.redhat.com/errata/RHSA-2026:66180
- https://access.redhat.com/security/cve/CVE-2026-53002Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2492329Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53002.jsonThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.