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CVE-2026-46182

In the Linux kernel, the following vulnerability has been resolved: pseries/papr-hvpipe: Prevent kernel stack memory leak to userspace The hdr variable is allocated on the stack and only hdr.version and hdr.flags are initialized explicitly. Because the struct papr_hvpipe_hdr contains reserved padding bytes (reserved[3] and reserved2[40]), these could leak the uninitialized bytes to userspace after copy_to_user(). This patch fixes that by initializing the whole struct to 0.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:3ff1943dfb13b47bf5c6806075bc25196916972218ae194d43f4108dacbdc6c6
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":"affected","product":"Linux","programFiles":["arch/powerpc/platforms/pseries/papr-hvpipe.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.18"},{"lessThan":"6.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.30","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.7","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c36e7c1f4857ce359e27ae1624cac65ae0ac74bfa3794ae2d532da53035cd599 · sha256:b6730ea0af6eed50… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["arch/powerpc/platforms/pseries/papr-hvpipe.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"0479b6e9f999cc1cbad7d9f09f574fc387e605d5","status":"affected","version":"cebdb522fd3edd1fe05f7b4a74a27da7dd0f8d86","versionType":"git"},{"lessThan":"f88f8e4485b437e0a2f96a7ff1f88aa22d925659","status":"affected","version":"cebdb522fd3edd1fe05f7b4a74a27da7dd0f8d86","versionType":"git"},{"lessThan":"cefeed44296261173a806bef988b26bc565da4be","status":"affected","version":"c…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c36e7c1f4857ce359e27ae1624cac65ae0ac74bfa3794ae2d532da53035cd599 · sha256:b6730ea0af6eed50… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["arch/powerpc/platforms/pseries/papr-hvpipe.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.18"},{"lessThan":"6.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.30","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.7","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c36e7c1f4857ce359e27ae1624cac65ae0ac74bfa3794ae2d532da53035cd599 · sha256:b6730ea0af6eed50… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["arch/powerpc/platforms/pseries/papr-hvpipe.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"0479b6e9f999cc1cbad7d9f09f574fc387e605d5","status":"affected","version":"cebdb522fd3edd1fe05f7b4a74a27da7dd0f8d86","versionType":"git"},{"lessThan":"f88f8e4485b437e0a2f96a7ff1f88aa22d925659","status":"affected","version":"cebdb522fd3edd1fe05f7b4a74a27da7dd0f8d86","versionType":"git"},{"lessThan":"cefeed44296261173a806bef988b26bc565da4be","status":"affected","version":"c…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c36e7c1f4857ce359e27ae1624cac65ae0ac74bfa3794ae2d532da53035cd599 · sha256:b6730ea0af6eed50… · /containers/cna/affected/0

Source references

3 source assertions
{"url":"https://git.kernel.org/stable/c/0479b6e9f999cc1cbad7d9f09f574fc387e605d5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c36e7c1f4857ce359e27ae1624cac65ae0ac74bfa3794ae2d532da53035cd599 · sha256:b6730ea0af6eed50… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/cefeed44296261173a806bef988b26bc565da4be"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c36e7c1f4857ce359e27ae1624cac65ae0ac74bfa3794ae2d532da53035cd599 · sha256:b6730ea0af6eed50… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/f88f8e4485b437e0a2f96a7ff1f88aa22d925659"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c36e7c1f4857ce359e27ae1624cac65ae0ac74bfa3794ae2d532da53035cd599 · sha256:b6730ea0af6eed50… · /containers/cna/references/1

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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