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CVE-2026-31457

In the Linux kernel, the following vulnerability has been resolved: mm/damon/sysfs: check contexts->nr in repeat_call_fn damon_sysfs_repeat_call_fn() calls damon_sysfs_upd_tuned_intervals(), damon_sysfs_upd_schemes_stats(), and damon_sysfs_upd_schemes_effective_quotas() without checking contexts->nr. If nr_contexts is set to 0 via sysfs while DAMON is running, these functions dereference contexts_arr[0] and cause a NULL pointer dereference. Add the missing check. For example, the issue can
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:13da7688b4a0fe3c89f9cbc5aa641d978800f3333324692034332c8b58a5bc8e
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":["mm/damon/sysfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"3527e9fdc38570cea0f6ddb7a2c9303d4044b217","status":"affected","version":"d809a7c64ba8229286b333c0cba03b1cdfb50238","versionType":"git"},{"lessThan":"652cd0641a763dd0e846b0d12814977fadb2b7d8","status":"affected","version":"d809a7c64ba8229286b333c0cba03b1cdfb50238","versionType":"git"},{"lessThan":"6557004a8b59c7701e695f02be03c7e20ed1cc15","status":"affected","version":"d809a7c64ba8229286b333c0cba03…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:480a5ddd82fd0dd38cbde9ed3942097f19e81ea4e74e50351229ee832e710ea2 · sha256:6a49e71a60b26eb4… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["mm/damon/sysfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.17"},{"lessThan":"6.17","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.21","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:480a5ddd82fd0dd38cbde9ed3942097f19e81ea4e74e50351229ee832e710ea2 · sha256:6a49e71a60b26eb4… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["mm/damon/sysfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"3527e9fdc38570cea0f6ddb7a2c9303d4044b217","status":"affected","version":"d809a7c64ba8229286b333c0cba03b1cdfb50238","versionType":"git"},{"lessThan":"652cd0641a763dd0e846b0d12814977fadb2b7d8","status":"affected","version":"d809a7c64ba8229286b333c0cba03b1cdfb50238","versionType":"git"},{"lessThan":"6557004a8b59c7701e695f02be03c7e20ed1cc15","status":"affected","version":"d809a7c64ba8229286b333c0cba03…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:480a5ddd82fd0dd38cbde9ed3942097f19e81ea4e74e50351229ee832e710ea2 · sha256:6a49e71a60b26eb4… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["mm/damon/sysfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.17"},{"lessThan":"6.17","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.21","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:480a5ddd82fd0dd38cbde9ed3942097f19e81ea4e74e50351229ee832e710ea2 · sha256:6a49e71a60b26eb4… · /containers/cna/affected/1

Source references

3 source assertions
{"url":"https://git.kernel.org/stable/c/3527e9fdc38570cea0f6ddb7a2c9303d4044b217"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:480a5ddd82fd0dd38cbde9ed3942097f19e81ea4e74e50351229ee832e710ea2 · sha256:6a49e71a60b26eb4… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/652cd0641a763dd0e846b0d12814977fadb2b7d8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:480a5ddd82fd0dd38cbde9ed3942097f19e81ea4e74e50351229ee832e710ea2 · sha256:6a49e71a60b26eb4… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/6557004a8b59c7701e695f02be03c7e20ed1cc15"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:480a5ddd82fd0dd38cbde9ed3942097f19e81ea4e74e50351229ee832e710ea2 · sha256:6a49e71a60b26eb4… · /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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