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CVE-2026-31446

In the Linux kernel, the following vulnerability has been resolved: ext4: fix use-after-free in update_super_work when racing with umount Commit b98535d09179 ("ext4: fix bug_on in start_this_handle during umount filesystem") moved ext4_unregister_sysfs() before flushing s_sb_upd_work to prevent new error work from being queued via /proc/fs/ext4/xx/mb_groups reads during unmount. However, this introduced a use-after-free because update_super_work calls ext4_notify_error_sysfs() -> sysfs_notify(
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7e85aa679fdd8a63ee0969ea51522a557644758b550d06f6f65ccefe00a45fa7
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 12 assertions

{"defaultStatus":"affected","product":"Linux","programFiles":["fs/ext4/ext4.h","fs/ext4/super.c","fs/ext4/sysfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.18"},{"lessThan":"5.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.168","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.131","versi…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/ext4/ext4.h","fs/ext4/super.c","fs/ext4/sysfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c8fe17a1b308c3d8c703ebfb049b325f844342c3","status":"affected","version":"52c3a04f9ec2a16a4204d6274db338cb8d5b2d74","versionType":"git"},{"lessThan":"c4d829737329f2290dd41e290b7d75effdb2a7ff","status":"affected","version":"b98535d091795a79336f520b0708457aacf55c67","versionType":"git"},{"lessThan":"9449f99ba04f5dd1c8423ad8a90b3651d7240d1d","status":"affected","versi…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/cna/affected/0

{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.5","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/adp/0/affected/7

{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/adp/0/affected/6

{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.5","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/adp/0/affected/5

{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.5","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/adp/0/affected/3

{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/adp/0/affected/0

{"defaultStatus":"unknown","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/adp/0/affected/8

{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.5","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/adp/0/affected/1

{"defaultStatus":"unknown","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.5","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/adp/0/affected/9

{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/adp/0/affected/2

{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/adp/0/affected/4

Affected products and versions

12 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["fs/ext4/ext4.h","fs/ext4/super.c","fs/ext4/sysfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.18"},{"lessThan":"5.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.168","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.131","versi…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/ext4/ext4.h","fs/ext4/super.c","fs/ext4/sysfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c8fe17a1b308c3d8c703ebfb049b325f844342c3","status":"affected","version":"52c3a04f9ec2a16a4204d6274db338cb8d5b2d74","versionType":"git"},{"lessThan":"c4d829737329f2290dd41e290b7d75effdb2a7ff","status":"affected","version":"b98535d091795a79336f520b0708457aacf55c67","versionType":"git"},{"lessThan":"9449f99ba04f5dd1c8423ad8a90b3651d7240d1d","status":"affected","versi…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/cna/affected/0
{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.5","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/adp/0/affected/7
{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/adp/0/affected/6
{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.5","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/adp/0/affected/5
{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.5","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/adp/0/affected/3
{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/adp/0/affected/0
{"defaultStatus":"unknown","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/adp/0/affected/8
{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.5","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/adp/0/affected/1
{"defaultStatus":"unknown","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.5","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/adp/0/affected/9
{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/adp/0/affected/2
{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/adp/0/affected/4

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/cna/metrics/0/cvssV3_1

Source references

9 source assertions
{"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/adp/0/references/1
{"url":"https://cert-portal.siemens.com/productcert/html/ssa-082556.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/adp/0/references/0
{"url":"https://git.kernel.org/stable/c/034053378dd81837fd6c7a43b37ee2e58d4f0b4e"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/08b10e6f37fc533a759e9833af0692242e8b3f93"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/cna/references/5
{"url":"https://git.kernel.org/stable/c/9449f99ba04f5dd1c8423ad8a90b3651d7240d1d"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/c4d829737329f2290dd41e290b7d75effdb2a7ff"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/c8fe17a1b308c3d8c703ebfb049b325f844342c3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/c97e282f7bfd0c3554c63d289964a5ca6a1d2ffe"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/d15e4b0a418537aafa56b2cb80d44add83e83697"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d11950283b4bc8a62470724e736af4db8cb864f65306094d505da926b9b8dcc7 · sha256:5f5461e356e44624… · /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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