CVE-2022-49053
scsi: target: tcmu: Fix possible page UAF
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: total
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: target: tcmu: Fix possible page UAF tcmu_try_get_data_page() looks up pages under cmdr_lock, but it does not take refcount properly and just returns page pointer. When tcmu_try_get_data_page() returns, the returned page may have been freed by tcmu_blocks_release(). We need to get_page() under cmdr_lock to avoid concurrent tcmu_blocks_release().
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
4.12
References 7
git.kernel.org
- stable/c/d7c5d79e50be6e06b669141e3db1f977a0dd4e8e
- stable/c/e3e0e067d5b34e4a68e3cc55f8eebc413f56f8ed
- stable/c/fb7a5115422fbd6a4d505e8844f1ef5529f10489
- stable/c/aec36b98a1bbaa84bfd8299a306e4c12314af626
- stable/c/b7f3b5d70c834f49f7d87a2f2ed1c6284d9a0322
- stable/c/a9564d84ed9f6ee71017d062d0d2182154294a4b
- stable/c/a6968f7a367f128d120447360734344d5a3d5336