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CVE-2026-53003

In the Linux kernel, the following vulnerability has been resolved: pppoe: drop PFC frames RFC 2516 Section 7 states that Protocol Field Compression (PFC) is NOT RECOMMENDED for PPPoE. In practice, pppd does not support negotiating PFC for PPPoE sessions, and the current PPPoE driver assumes an uncompressed (2-byte) protocol field. However, the generic PPP layer function ppp_input() is not aware of the negotiation result, and still accepts PFC frames. If a peer with a broken implementation or
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:17ec505cc75a48cb337e8914b7029c1caf4ad2d75ee1dbbed3d864271598ee64
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":["drivers/net/ppp/ppp_generic.c","drivers/net/ppp/pppoe.c","include/linux/ppp_defs.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"cb3beef35ab5e0c1afca9fd7648c6ae499786377","status":"affected","version":"7fb1b8ca8fa1ee34ffc328f17f78da68c7cc04e6","versionType":"git"},{"lessThan":"ba758fdf1399f310b30098b6faa3fd043de47dd2","status":"affected","version":"7fb1b8ca8fa1ee34ffc328f17f78da68c7cc04e6","versionType":"git"},{"lessThan":"fcca1df05322bb04e344dd1178b54b76a08e…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:73819874ed228caade3ecbc426d37198e27d5b8baf057d69c596e00c9bcef9ae · sha256:c9fca904130c6347… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/ppp/ppp_generic.c","drivers/net/ppp/pppoe.c","include/linux/ppp_defs.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.0"},{"lessThan":"5.0","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.258","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.209","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffe…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:73819874ed228caade3ecbc426d37198e27d5b8baf057d69c596e00c9bcef9ae · sha256:c9fca904130c6347… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/ppp/ppp_generic.c","drivers/net/ppp/pppoe.c","include/linux/ppp_defs.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"cb3beef35ab5e0c1afca9fd7648c6ae499786377","status":"affected","version":"7fb1b8ca8fa1ee34ffc328f17f78da68c7cc04e6","versionType":"git"},{"lessThan":"ba758fdf1399f310b30098b6faa3fd043de47dd2","status":"affected","version":"7fb1b8ca8fa1ee34ffc328f17f78da68c7cc04e6","versionType":"git"},{"lessThan":"fcca1df05322bb04e344dd1178b54b76a08e…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:73819874ed228caade3ecbc426d37198e27d5b8baf057d69c596e00c9bcef9ae · sha256:c9fca904130c6347… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/ppp/ppp_generic.c","drivers/net/ppp/pppoe.c","include/linux/ppp_defs.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.0"},{"lessThan":"5.0","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.258","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.209","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffe…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:73819874ed228caade3ecbc426d37198e27d5b8baf057d69c596e00c9bcef9ae · sha256:c9fca904130c6347… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:73819874ed228caade3ecbc426d37198e27d5b8baf057d69c596e00c9bcef9ae · sha256:c9fca904130c6347… · /containers/cna/metrics/0/cvssV3_1

Source references

8 source assertions
{"url":"https://git.kernel.org/stable/c/0cab5d077dd1efd2bd1a47271acc35894f945b4f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:73819874ed228caade3ecbc426d37198e27d5b8baf057d69c596e00c9bcef9ae · sha256:c9fca904130c6347… · /containers/cna/references/5
{"url":"https://git.kernel.org/stable/c/2b5c3c040d020e3ab3b9a8887031202d96843b1e"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:73819874ed228caade3ecbc426d37198e27d5b8baf057d69c596e00c9bcef9ae · sha256:c9fca904130c6347… · /containers/cna/references/6
{"url":"https://git.kernel.org/stable/c/49e41b60ccd1bdbe9e218420f716dd5f9a2f9c71"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:73819874ed228caade3ecbc426d37198e27d5b8baf057d69c596e00c9bcef9ae · sha256:c9fca904130c6347… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/8a5e840babc5c0fbd10c73728a13192347771ec6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:73819874ed228caade3ecbc426d37198e27d5b8baf057d69c596e00c9bcef9ae · sha256:c9fca904130c6347… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/ba758fdf1399f310b30098b6faa3fd043de47dd2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:73819874ed228caade3ecbc426d37198e27d5b8baf057d69c596e00c9bcef9ae · sha256:c9fca904130c6347… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/cb3beef35ab5e0c1afca9fd7648c6ae499786377"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:73819874ed228caade3ecbc426d37198e27d5b8baf057d69c596e00c9bcef9ae · sha256:c9fca904130c6347… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/cc1ff87bce1ccd38410ab10960f576dcd17db679"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:73819874ed228caade3ecbc426d37198e27d5b8baf057d69c596e00c9bcef9ae · sha256:c9fca904130c6347… · /containers/cna/references/7
{"url":"https://git.kernel.org/stable/c/fcca1df05322bb04e344dd1178b54b76a08eb7c3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:73819874ed228caade3ecbc426d37198e27d5b8baf057d69c596e00c9bcef9ae · sha256:c9fca904130c6347… · /containers/cna/references/2

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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