CVE-2022-49307 (GCVE-0-2022-49307)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:10 – Updated: 2025-12-23 13:23
VLAI?
Title
tty: synclink_gt: Fix null-pointer-dereference in slgt_clean()
Summary
In the Linux kernel, the following vulnerability has been resolved: tty: synclink_gt: Fix null-pointer-dereference in slgt_clean() When the driver fails at alloc_hdlcdev(), and then we remove the driver module, we will get the following splat: [ 25.065966] general protection fault, probably for non-canonical address 0xdffffc0000000182: 0000 [#1] PREEMPT SMP KASAN PTI [ 25.066914] KASAN: null-ptr-deref in range [0x0000000000000c10-0x0000000000000c17] [ 25.069262] RIP: 0010:detach_hdlc_protocol+0x2a/0x3e0 [ 25.077709] Call Trace: [ 25.077924] <TASK> [ 25.078108] unregister_hdlc_device+0x16/0x30 [ 25.078481] slgt_cleanup+0x157/0x9f0 [synclink_gt] Fix this by checking whether the 'info->netdev' is a null pointer first.
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 , < 50c341f9a2adc4c32a8ad5a39eb99d9c4a419e0d (git)
Affected: 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 , < 078212ad15dbd88840c82c97f12c93d83703c8fd (git)
Affected: 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 , < ba08cbc5b53e151d0acf1930fb526fc65b7f3e65 (git)
Affected: 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 , < f6e07eb7ebec53ffe81fc2489589320fbe4a6b75 (git)
Affected: 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 , < d68d5e68b7f64de7170f8e04dd9b995c36b2c71c (git)
Affected: 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 , < 8a95696bdc0e13f8980f05b54a3b9081963d1256 (git)
Affected: 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 , < ddd67751ab86c6a65f95c35293c42f85a42ac05d (git)
Affected: 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 , < 1ceb4ca9543a8a788febf6bc8dad2e605e172d5e (git)
Affected: 705b6c7b34f2621f95f606d0e683daa10cdb8eb9 , < 689ca31c542687709ba21ec2195c1fbce34fd029 (git)
Create a notification for this product.
    Linux Linux Affected: 2.6.16
Unaffected: 0 , < 2.6.16 (semver)
Unaffected: 4.9.318 , ≤ 4.9.* (semver)
Unaffected: 4.14.283 , ≤ 4.14.* (semver)
Unaffected: 4.19.247 , ≤ 4.19.* (semver)
Unaffected: 5.4.198 , ≤ 5.4.* (semver)
Unaffected: 5.10.122 , ≤ 5.10.* (semver)
Unaffected: 5.15.47 , ≤ 5.15.* (semver)
Unaffected: 5.17.15 , ≤ 5.17.* (semver)
Unaffected: 5.18.4 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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\"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.17.15\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.17.*\"}, {\"status\": \"unaffected\", \"version\": \"5.18.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.18.*\"}, {\"status\": \"unaffected\", \"version\": \"5.19\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/tty/synclink_gt.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/50c341f9a2adc4c32a8ad5a39eb99d9c4a419e0d\"}, {\"url\": \"https://git.kernel.org/stable/c/078212ad15dbd88840c82c97f12c93d83703c8fd\"}, {\"url\": \"https://git.kernel.org/stable/c/ba08cbc5b53e151d0acf1930fb526fc65b7f3e65\"}, {\"url\": \"https://git.kernel.org/stable/c/f6e07eb7ebec53ffe81fc2489589320fbe4a6b75\"}, {\"url\": \"https://git.kernel.org/stable/c/d68d5e68b7f64de7170f8e04dd9b995c36b2c71c\"}, {\"url\": \"https://git.kernel.org/stable/c/8a95696bdc0e13f8980f05b54a3b9081963d1256\"}, {\"url\": \"https://git.kernel.org/stable/c/ddd67751ab86c6a65f95c35293c42f85a42ac05d\"}, {\"url\": \"https://git.kernel.org/stable/c/1ceb4ca9543a8a788febf6bc8dad2e605e172d5e\"}, {\"url\": \"https://git.kernel.org/stable/c/689ca31c542687709ba21ec2195c1fbce34fd029\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntty: synclink_gt: Fix null-pointer-dereference in slgt_clean()\\n\\nWhen the driver fails at alloc_hdlcdev(), and then we remove the driver\\nmodule, we will get the following splat:\\n\\n[   25.065966] general protection fault, probably for non-canonical address 0xdffffc0000000182: 0000 [#1] PREEMPT SMP KASAN PTI\\n[   25.066914] KASAN: null-ptr-deref in range [0x0000000000000c10-0x0000000000000c17]\\n[   25.069262] RIP: 0010:detach_hdlc_protocol+0x2a/0x3e0\\n[   25.077709] Call Trace:\\n[   25.077924]  \u003cTASK\u003e\\n[   25.078108]  unregister_hdlc_device+0x16/0x30\\n[   25.078481]  slgt_cleanup+0x157/0x9f0 [synclink_gt]\\n\\nFix this by checking whether the \u0027info-\u003enetdev\u0027 is a null pointer first.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.9.318\", \"versionStartIncluding\": \"2.6.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.283\", \"versionStartIncluding\": \"2.6.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.247\", \"versionStartIncluding\": \"2.6.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.198\", \"versionStartIncluding\": \"2.6.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.122\", \"versionStartIncluding\": \"2.6.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.47\", \"versionStartIncluding\": \"2.6.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.17.15\", \"versionStartIncluding\": \"2.6.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.18.4\", \"versionStartIncluding\": \"2.6.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.19\", \"versionStartIncluding\": \"2.6.16\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-12-23T13:23:23.627Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-49307\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-12-23T13:23:23.627Z\", \"dateReserved\": \"2025-02-26T02:08:31.535Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-02-26T02:10:39.151Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

Author Source Type Date

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.