CVE-2026-74569 evidence review

Linux

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_sip: widen NAT rewrite delta to s32 in sip_help_tcp() sip_help_tcp() stores the size change of each NAT-rewritten SIP message in s16 diff and accumulates it in s16 tdiff, but a single message can grow by more than S16_MAX while the packet stays under the 65535 enlarge_skb() limit: nf_nat_sip() rewrites every matching URI, and a long Contact list expands the message by tens of kilobytes. diff then wraps, and "datalen = datalen + diff - msglen" yields a huge unsigned datalen, so the next iteration's ct...

Open CVE record

Evidence review

This record remains available for product and version identification, but it is not presented as a complete remediation procedure. Confirm the affected range and the supported fix in a direct vendor advisory before changing production systems.

ProductLinux

Affected versions>= f5b321bd37fbec9188feb1f721ab46a5ac0b35da < ed1f9be6dc8e2e280b8725e44ccdc6e0cd38640d, >= f5b321bd37fbec9188feb1f721ab46a5ac0b35da < 1b0843f9e9b9b0b9b4b70d143b67e58163c85b2c, >= f5b321bd37fbec9188feb1f721ab46a5ac0b35da < 32d4abc8923b0d4046fd63ad6e4917872e44eb6d, >= f5b321bd37fbec9188feb1f721ab46a5ac0b35da < 63eea41759fd682229c14e0a2205802b46d106f3, >= f5b321bd37fbec9188feb1f721ab46a5ac0b35da < c97621a110e386b2dd69e276eb699e1d3cec581d, >= f5b321bd37fbec9188feb1f721ab46a5ac0b35da < f74554e67ccf04d1fa71069e8c9afa2717e40716, >= f5b321bd37fbec9188feb1f721ab46a5ac0b35da < ef5e2c6555d2bb52dfe0e4053a8c6193f9d83b64, >= f5b321bd37fbec9188feb1f721ab46a5ac0b35da < db3d0e0e5d4bc5ab4fe445b9f413d1b486508ca5, >= 2.6.34

Fixed versionsNo verified fixed-version field is available yet

Priority basisReview · CVSS 9.8 · EPSS -

Identify the product and installed version

Record whether Linux is present, where it is installed, and which interfaces are exposed.

Record the product name, package or appliance identifier, and installed version.
Identify internet-facing, administrative, API, and internal access paths.
Preserve the pre-change configuration and relevant service logs.

Compare the affected range

Use the current record as an identification aid: >= f5b321bd37fbec9188feb1f721ab46a5ac0b35da < ed1f9be6dc8e2e280b8725e44ccdc6e0cd38640d, >= f5b321bd37fbec9188feb1f721ab46a5ac0b35da < 1b0843f9e9b9b0b9b4b70d143b67e58163c85b2c, >= f5b321bd37fbec9188feb1f721ab46a5ac0b35da < 32d4abc8923b0d4046fd63ad6e4917872e44eb6d, >= f5b321bd37fbec9188feb1f721ab46a5ac0b35da < 63eea41759fd682229c14e0a2205802b46d106f3, >= f5b321bd37fbec9188feb1f721ab46a5ac0b35da < c97621a110e386b2dd69e276eb699e1d3cec581d, >= f5b321bd37fbec9188feb1f721ab46a5ac0b35da < f74554e67ccf04d1fa71069e8c9afa2717e40716, >= f5b321bd37fbec9188feb1f721ab46a5ac0b35da < ef5e2c6555d2bb52dfe0e4053a8c6193f9d83b64, >= f5b321bd37fbec9188feb1f721ab46a5ac0b35da < db3d0e0e5d4bc5ab4fe445b9f413d1b486508ca5, >= 2.6.34. Resolve incomplete inventory results before deciding that an asset is unaffected.

Verify the authoritative remediation source

Open the linked source material and locate a direct vendor advisory for this CVE. Confirm the supported fixed release and product-specific update path before making a production change.

Operational boundary

This page does not replace the vendor advisory, support contract, change-management process, or recovery plan. Do not infer that an asset is unaffected from an incomplete inventory query or a missing fixed-version field.