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CVE-2026-53218

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_exthdr: fix register tracking for F_PRESENT flag nft_exthdr_init() passes user-controlled priv->len to nft_parse_register_store(), which marks that many bytes in the register bitmap as initialized. However, when NFT_EXTHDR_F_PRESENT is set, the eval paths write only 1 byte (nft_reg_store8) or 4 bytes (*dest = 0 on TCP/DCCP error path). When len > 4, registers beyond the first are never written, retaining unini
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:f3d9d8f768179aa43775c1d219efd5dc35dbc57c684a8b2cd915eb0234b0b691
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/netfilter/nft_exthdr.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"8738b1b6d0e639ca1fc0f61516afd3557ac4ecc6","status":"affected","version":"c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783","versionType":"git"},{"lessThan":"19748967d59c31d24d21d40b728570788310b237","status":"affected","version":"c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783","versionType":"git"},{"lessThan":"46fc15a044e9938e7ea77786fb37edd2cd74f031","status":"affected","version":"c078ca3b0c5bf82c2b3…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9af234f691de14d6d54f3f1026f7805cdc0c5b74bf095779a32fba219c897f81 · sha256:0c24ad8ed82541cc… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["net/netfilter/nft_exthdr.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.11"},{"lessThan":"4.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.259","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.210","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.176","versionType":"semver"},{"le…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9af234f691de14d6d54f3f1026f7805cdc0c5b74bf095779a32fba219c897f81 · sha256:0c24ad8ed82541cc… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/netfilter/nft_exthdr.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"8738b1b6d0e639ca1fc0f61516afd3557ac4ecc6","status":"affected","version":"c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783","versionType":"git"},{"lessThan":"19748967d59c31d24d21d40b728570788310b237","status":"affected","version":"c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783","versionType":"git"},{"lessThan":"46fc15a044e9938e7ea77786fb37edd2cd74f031","status":"affected","version":"c078ca3b0c5bf82c2b3…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9af234f691de14d6d54f3f1026f7805cdc0c5b74bf095779a32fba219c897f81 · sha256:0c24ad8ed82541cc… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["net/netfilter/nft_exthdr.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.11"},{"lessThan":"4.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.259","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.210","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.176","versionType":"semver"},{"le…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9af234f691de14d6d54f3f1026f7805cdc0c5b74bf095779a32fba219c897f81 · sha256:0c24ad8ed82541cc… · /containers/cna/affected/1

Source references

8 source assertions
{"url":"https://git.kernel.org/stable/c/19748967d59c31d24d21d40b728570788310b237"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9af234f691de14d6d54f3f1026f7805cdc0c5b74bf095779a32fba219c897f81 · sha256:0c24ad8ed82541cc… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/46fc15a044e9938e7ea77786fb37edd2cd74f031"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9af234f691de14d6d54f3f1026f7805cdc0c5b74bf095779a32fba219c897f81 · sha256:0c24ad8ed82541cc… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/67b27434c43b68a97becda98c9f0c8cf6cba2134"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9af234f691de14d6d54f3f1026f7805cdc0c5b74bf095779a32fba219c897f81 · sha256:0c24ad8ed82541cc… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/772cecf198da732faebb5dcfc46d66a505be8495"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9af234f691de14d6d54f3f1026f7805cdc0c5b74bf095779a32fba219c897f81 · sha256:0c24ad8ed82541cc… · /containers/cna/references/7
{"url":"https://git.kernel.org/stable/c/78069a6d8bc86c9e036eb82c2af4a19cc1871a53"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9af234f691de14d6d54f3f1026f7805cdc0c5b74bf095779a32fba219c897f81 · sha256:0c24ad8ed82541cc… · /containers/cna/references/5
{"url":"https://git.kernel.org/stable/c/8738b1b6d0e639ca1fc0f61516afd3557ac4ecc6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9af234f691de14d6d54f3f1026f7805cdc0c5b74bf095779a32fba219c897f81 · sha256:0c24ad8ed82541cc… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/cd513e43b4b2bd1de39e2367bc4261c699a8652f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9af234f691de14d6d54f3f1026f7805cdc0c5b74bf095779a32fba219c897f81 · sha256:0c24ad8ed82541cc… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/f08fb3d42fd3aad0b7a263da3ac3ebaf0845e265"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9af234f691de14d6d54f3f1026f7805cdc0c5b74bf095779a32fba219c897f81 · sha256:0c24ad8ed82541cc… · /containers/cna/references/6

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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