CVE-2024-40966 (GCVE-0-2024-40966)

Vulnerability from cvelistv5 – Published: 2024-07-12 12:32 – Updated: 2026-01-05 10:36
VLAI?
Title
tty: add the option to have a tty reject a new ldisc
Summary
In the Linux kernel, the following vulnerability has been resolved: tty: add the option to have a tty reject a new ldisc ... and use it to limit the virtual terminals to just N_TTY. They are kind of special, and in particular, the "con_write()" routine violates the "writes cannot sleep" rule that some ldiscs rely on. This avoids the BUG: sleeping function called from invalid context at kernel/printk/printk.c:2659 when N_GSM has been attached to a virtual console, and gsmld_write() calls con_write() while holding a spinlock, and con_write() then tries to get the console lock.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: e1eaea46bb4020b38a141b84f88565d4603f8dd0 , < 3c6332f3bb1578b5b10ac2561247b1d6272ae937 (git)
Affected: e1eaea46bb4020b38a141b84f88565d4603f8dd0 , < 287b569a5b914903ba7c438a3c0dbc3410ebb409 (git)
Affected: e1eaea46bb4020b38a141b84f88565d4603f8dd0 , < 5920ac19964f9e20181f63b410d9200ddbf8dc86 (git)
Affected: e1eaea46bb4020b38a141b84f88565d4603f8dd0 , < 6bd23e0c2bb6c65d4f5754d1456bc9a4427fc59b (git)
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    Linux Linux Affected: 2.6.35
Unaffected: 0 , < 2.6.35 (semver)
Unaffected: 6.1.96 , ≤ 6.1.* (semver)
Unaffected: 6.6.36 , ≤ 6.6.* (semver)
Unaffected: 6.9.7 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.