Bug 1216693 (CVE-2023-46862) - VUL-0: CVE-2023-46862: kernel: NULL pointer dereference in io_uring_show_fdinfo
Summary: VUL-0: CVE-2023-46862: kernel: NULL pointer dereference in io_uring_show_fdinfo
Status: RESOLVED FIXED
Alias: CVE-2023-46862
Product: SUSE Security Incidents
Classification: Novell Products
Component: Incidents (show other bugs)
Version: unspecified
Hardware: Other Other
: P3 - Medium : Normal
Target Milestone: ---
Assignee: Security Team bot
QA Contact: Security Team bot
URL: https://smash.suse.de/issue/383410/
Whiteboard: CVSSv3.1:SUSE:CVE-2023-46862:5.5:(AV:...
Keywords:
Depends on:
Blocks:
 
Reported: 2023-10-30 08:26 UTC by SMASH SMASH
Modified: 2024-06-25 17:59 UTC (History)
5 users (show)

See Also:
Found By: Security Response Team
Services Priority:
Business Priority:
Blocker: ---
Marketing QA Status: ---
IT Deployment: ---

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Description SMASH SMASH 2023-10-30 08:26:57 UTC 
An issue was discovered in the Linux kernel through 6.5.9. During a race with SQ thread exit, an io_uring/fdinfo.c io_uring_show_fdinfo NULL pointer dereference can occur.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-46862
Comment 1 Gabriele Sonnu 2023-10-30 08:31:18 UTC 
Upstream fix:

https://github.com/torvalds/linux/commit/7644b1a1c9a7ae8ab99175989bfc8676055edb46

Tracking as affected:

 - SLE15-SP4
 - SLE15-SP5
 - SLE15-SP6
 - stable

For 15-SP4 and 15-SP5, offending code is found inside fs/io_uring.c, for 15-SP6 and stable inside io_uring/fdinfo.c.
Comment 2 Chester Lin 2023-10-31 03:53:27 UTC 
Reassigning to a concrete person to ensure progress [1] (feel free to pass to the next one), see also the process at [2].
 
Hi Gabriel,

Could you help to check if your upstream patch can be backported to SUSE kernel trees? Thank you.
 
[1] https://confluence.suse.com/display/KSS/Kernel+Security+Sentinel
[2] https://wiki.suse.net/index.php/SUSE-Labs/Kernel/Security
Comment 3 Gabriel Krisman Bertazi 2023-10-31 21:49:28 UTC 
hey guys,

I'd dispute the notion this is a security vulnerability. It feels as another instance of someone submitting a silly, unexploitable bug to collect the credit for the discovery.  We should start disputing these CVEs.

That said, the fix is correct. I'd eventually get to it with git-fixes.

I've queue the following patches to the corresponding for-next branches:

- 15SP6: 4166e77a73a io_uring/fdinfo: lock SQ thread while retrieving thread cpu/pid (bsc#1216693 CVE-2023-46862).

- 15SP5: 54290b68e6a io_uring/fdinfo: lock SQ thread while retrieving thread cpu/pid (bsc#1216693 CVE-2023-46862).

- 15SP4: 7e92d76bab6 io_uring/fdinfo: lock SQ thread while retrieving thread cpu/pid (bsc#1216693 CVE-2023-46862).

- 15SP3 and lower: Not applicable. The bug was introduced in 5.10 by commit dbbe9c642411c359ad0a0e32442eb2e11d3811b5 ("io_uring: show sqthread pid and cpu in fdinfo"), so anything <5.10 is not affected.

Back to the security team.

Thanks!
Comment 19 Maintenance Automation 2023-12-12 16:30:05 UTC 
SUSE-SU-2023:4732-1: An update that solves 15 vulnerabilities, contains three features and has 39 security fixes can now be installed.

Category: security (important)
Bug References: 1207948, 1210447, 1212649, 1214286, 1214700, 1214840, 1214976, 1215095, 1215123, 1215124, 1215292, 1215420, 1215458, 1215710, 1215802, 1215931, 1216058, 1216105, 1216259, 1216527, 1216584, 1216621, 1216687, 1216693, 1216759, 1216761, 1216788, 1216844, 1216861, 1216909, 1216959, 1216965, 1216976, 1217036, 1217068, 1217086, 1217095, 1217124, 1217140, 1217147, 1217195, 1217196, 1217200, 1217205, 1217332, 1217366, 1217511, 1217515, 1217598, 1217599, 1217609, 1217687, 1217731, 1217780
CVE References: CVE-2023-2006, CVE-2023-25775, CVE-2023-3777, CVE-2023-39197, CVE-2023-39198, CVE-2023-4244, CVE-2023-45863, CVE-2023-45871, CVE-2023-46813, CVE-2023-46862, CVE-2023-5158, CVE-2023-5633, CVE-2023-5717, CVE-2023-6039, CVE-2023-6176
Jira References: PED-3184, PED-5021, PED-7237
Sources used:
openSUSE Leap 15.5 (src): kernel-source-rt-5.14.21-150500.13.27.2, kernel-syms-rt-5.14.21-150500.13.27.1, kernel-livepatch-SLE15-SP5-RT_Update_8-1-150500.11.3.2
SUSE Linux Enterprise Live Patching 15-SP5 (src): kernel-livepatch-SLE15-SP5-RT_Update_8-1-150500.11.3.2
SUSE Real Time Module 15-SP5 (src): kernel-source-rt-5.14.21-150500.13.27.2, kernel-syms-rt-5.14.21-150500.13.27.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.
Comment 20 Maintenance Automation 2023-12-12 16:30:15 UTC 
SUSE-SU-2023:4731-1: An update that solves 12 vulnerabilities, contains three features and has 28 security fixes can now be installed.

Category: security (important)
Bug References: 1084909, 1189998, 1210447, 1214286, 1214976, 1215124, 1215292, 1215420, 1215458, 1215710, 1216058, 1216105, 1216259, 1216584, 1216693, 1216759, 1216761, 1216844, 1216861, 1216909, 1216959, 1216965, 1216976, 1217036, 1217068, 1217086, 1217124, 1217140, 1217195, 1217200, 1217205, 1217332, 1217366, 1217515, 1217598, 1217599, 1217609, 1217687, 1217731, 1217780
CVE References: CVE-2023-2006, CVE-2023-25775, CVE-2023-39197, CVE-2023-39198, CVE-2023-4244, CVE-2023-45863, CVE-2023-45871, CVE-2023-46862, CVE-2023-5158, CVE-2023-5717, CVE-2023-6039, CVE-2023-6176
Jira References: PED-3184, PED-5021, PED-7237
Sources used:
openSUSE Leap 15.4 (src): kernel-source-rt-5.14.21-150400.15.62.1, kernel-syms-rt-5.14.21-150400.15.62.1
SUSE Linux Enterprise Live Patching 15-SP4 (src): kernel-livepatch-SLE15-SP4-RT_Update_16-1-150400.1.3.1
SUSE Real Time Module 15-SP4 (src): kernel-source-rt-5.14.21-150400.15.62.1, kernel-syms-rt-5.14.21-150400.15.62.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.
Comment 21 Maintenance Automation 2023-12-12 16:30:34 UTC 
SUSE-SU-2023:4734-1: An update that solves 13 vulnerabilities, contains three features and has 38 security fixes can now be installed.

Category: security (important)
Bug References: 1084909, 1207948, 1210447, 1214286, 1214700, 1214840, 1214976, 1215123, 1215124, 1215292, 1215420, 1215458, 1215710, 1215802, 1215931, 1216058, 1216105, 1216259, 1216527, 1216584, 1216687, 1216693, 1216759, 1216788, 1216844, 1216861, 1216909, 1216959, 1216965, 1216976, 1217036, 1217068, 1217086, 1217095, 1217124, 1217140, 1217147, 1217195, 1217196, 1217200, 1217205, 1217332, 1217366, 1217511, 1217515, 1217598, 1217599, 1217609, 1217687, 1217731, 1217780
CVE References: CVE-2023-2006, CVE-2023-25775, CVE-2023-39197, CVE-2023-39198, CVE-2023-4244, CVE-2023-45863, CVE-2023-45871, CVE-2023-46862, CVE-2023-5158, CVE-2023-5633, CVE-2023-5717, CVE-2023-6039, CVE-2023-6176
Jira References: PED-3184, PED-5021, PED-7237
Sources used:
openSUSE Leap 15.5 (src): kernel-syms-azure-5.14.21-150500.33.26.1, kernel-source-azure-5.14.21-150500.33.26.1
Public Cloud Module 15-SP5 (src): kernel-syms-azure-5.14.21-150500.33.26.1, kernel-source-azure-5.14.21-150500.33.26.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.
Comment 22 Maintenance Automation 2023-12-12 16:30:49 UTC 
SUSE-SU-2023:4730-1: An update that solves 13 vulnerabilities, contains three features and has 38 security fixes can now be installed.

Category: security (important)
Bug References: 1084909, 1207948, 1210447, 1214286, 1214700, 1214840, 1214976, 1215123, 1215124, 1215292, 1215420, 1215458, 1215710, 1215802, 1215931, 1216058, 1216105, 1216259, 1216527, 1216584, 1216687, 1216693, 1216759, 1216788, 1216844, 1216861, 1216909, 1216959, 1216965, 1216976, 1217036, 1217068, 1217086, 1217095, 1217124, 1217140, 1217147, 1217195, 1217196, 1217200, 1217205, 1217332, 1217366, 1217511, 1217515, 1217598, 1217599, 1217609, 1217687, 1217731, 1217780
CVE References: CVE-2023-2006, CVE-2023-25775, CVE-2023-39197, CVE-2023-39198, CVE-2023-4244, CVE-2023-45863, CVE-2023-45871, CVE-2023-46862, CVE-2023-5158, CVE-2023-5633, CVE-2023-5717, CVE-2023-6039, CVE-2023-6176
Jira References: PED-3184, PED-5021, PED-7237
Sources used:
openSUSE Leap 15.5 (src): kernel-syms-5.14.21-150500.55.39.1, kernel-source-5.14.21-150500.55.39.1, kernel-livepatch-SLE15-SP5_Update_8-1-150500.11.3.1, kernel-obs-build-5.14.21-150500.55.39.1, kernel-obs-qa-5.14.21-150500.55.39.1, kernel-default-base-5.14.21-150500.55.39.1.150500.6.17.1
SUSE Linux Enterprise Micro 5.5 (src): kernel-default-base-5.14.21-150500.55.39.1.150500.6.17.1
Basesystem Module 15-SP5 (src): kernel-source-5.14.21-150500.55.39.1, kernel-default-base-5.14.21-150500.55.39.1.150500.6.17.1
Development Tools Module 15-SP5 (src): kernel-source-5.14.21-150500.55.39.1, kernel-syms-5.14.21-150500.55.39.1, kernel-obs-build-5.14.21-150500.55.39.1
SUSE Linux Enterprise Live Patching 15-SP5 (src): kernel-livepatch-SLE15-SP5_Update_8-1-150500.11.3.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.
Comment 23 Maintenance Automation 2023-12-13 16:30:50 UTC 
SUSE-SU-2023:4782-1: An update that solves 12 vulnerabilities, contains three features and has 25 security fixes can now be installed.

Category: security (important)
Bug References: 1210447, 1214286, 1214976, 1215124, 1215292, 1215420, 1215458, 1215710, 1216058, 1216105, 1216259, 1216584, 1216693, 1216759, 1216844, 1216861, 1216909, 1216959, 1216965, 1216976, 1217036, 1217068, 1217086, 1217124, 1217140, 1217195, 1217200, 1217205, 1217332, 1217366, 1217515, 1217598, 1217599, 1217609, 1217687, 1217731, 1217780
CVE References: CVE-2023-2006, CVE-2023-25775, CVE-2023-39197, CVE-2023-39198, CVE-2023-4244, CVE-2023-45863, CVE-2023-45871, CVE-2023-46862, CVE-2023-5158, CVE-2023-5717, CVE-2023-6039, CVE-2023-6176
Jira References: PED-3184, PED-5021, PED-7237
Sources used:
openSUSE Leap 15.4 (src): kernel-source-azure-5.14.21-150400.14.75.1, kernel-syms-azure-5.14.21-150400.14.75.1
Public Cloud Module 15-SP4 (src): kernel-source-azure-5.14.21-150400.14.75.1, kernel-syms-azure-5.14.21-150400.14.75.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.
Comment 24 Maintenance Automation 2023-12-13 20:30:35 UTC 
SUSE-SU-2023:4810-1: An update that solves 12 vulnerabilities, contains three features and has 26 security fixes can now be installed.

Category: security (important)
Bug References: 1084909, 1210447, 1214286, 1214976, 1215124, 1215292, 1215420, 1215458, 1215710, 1216058, 1216105, 1216259, 1216584, 1216693, 1216759, 1216844, 1216861, 1216909, 1216959, 1216965, 1216976, 1217036, 1217068, 1217086, 1217124, 1217140, 1217195, 1217200, 1217205, 1217332, 1217366, 1217515, 1217598, 1217599, 1217609, 1217687, 1217731, 1217780
CVE References: CVE-2023-2006, CVE-2023-25775, CVE-2023-39197, CVE-2023-39198, CVE-2023-4244, CVE-2023-45863, CVE-2023-45871, CVE-2023-46862, CVE-2023-5158, CVE-2023-5717, CVE-2023-6039, CVE-2023-6176
Jira References: PED-3184, PED-5021, PED-7237
Sources used:
openSUSE Leap 15.4 (src): kernel-obs-qa-5.14.21-150400.24.100.1, kernel-obs-build-5.14.21-150400.24.100.2, kernel-syms-5.14.21-150400.24.100.1, kernel-default-base-5.14.21-150400.24.100.2.150400.24.46.2, kernel-source-5.14.21-150400.24.100.2, kernel-livepatch-SLE15-SP4_Update_21-1-150400.9.3.2
openSUSE Leap Micro 5.3 (src): kernel-default-base-5.14.21-150400.24.100.2.150400.24.46.2
openSUSE Leap Micro 5.4 (src): kernel-default-base-5.14.21-150400.24.100.2.150400.24.46.2
SUSE Linux Enterprise Micro for Rancher 5.3 (src): kernel-default-base-5.14.21-150400.24.100.2.150400.24.46.2
SUSE Linux Enterprise Micro 5.3 (src): kernel-default-base-5.14.21-150400.24.100.2.150400.24.46.2
SUSE Linux Enterprise Micro for Rancher 5.4 (src): kernel-default-base-5.14.21-150400.24.100.2.150400.24.46.2
SUSE Linux Enterprise Micro 5.4 (src): kernel-default-base-5.14.21-150400.24.100.2.150400.24.46.2
Basesystem Module 15-SP4 (src): kernel-default-base-5.14.21-150400.24.100.2.150400.24.46.2, kernel-source-5.14.21-150400.24.100.2
Development Tools Module 15-SP4 (src): kernel-source-5.14.21-150400.24.100.2, kernel-obs-build-5.14.21-150400.24.100.2, kernel-syms-5.14.21-150400.24.100.1
SUSE Linux Enterprise Live Patching 15-SP4 (src): kernel-livepatch-SLE15-SP4_Update_21-1-150400.9.3.2

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.