mrp: introduce active flags to prevent UAF when applicant uninit
In the Linux kernel, the following vulnerability has been resolved: mrp: introduce active flags to prevent UAF when applicant uninit The caller of del_timer_sync must prevent restarting of the timer, If we have no this synchronization, there is a small probability that the cancellation will not be successful. And syzbot report the fellowing crash: ================================================================== BUG: KASAN: use-after-free in hlist_add_head include/linux/list.h:929 [inline] BUG: KASAN: use-after-free in enqueue_timer+0x18/0xa4 kernel/time/timer.c:605 Write at addr f9ff000024df6058 by task syz-fuzzer/2256 Pointer tag: [f9], memory tag: [fe] CPU: 1 PID: 2256 Comm: syz-fuzzer Not tainted 6.1.0-rc5-syzkaller-00008- ge01d50cbd6ee #0 Hardware name: linux,dummy-virt (DT) Call trace: dump_backtrace.part.0+0xe0/0xf0 arch/arm64/kernel/stacktrace.c:156 dump_backtrace arch/arm64/kernel/stacktrace.c:162 [inline] show_stack+0x18/0x40 arch/arm64/kernel/stacktrace.c:163 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x68/0x84 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x1a8/0x4a0 mm/kasan/report.c:395 kasan_report+0x94/0xb4 mm/kasan/report.c:495 __do_kernel_fault+0x164/0x1e0 arch/arm64/mm/fault.c:320 do_bad_area arch/arm64/mm/fault.c:473 [inline] do_tag_check_fault+0x78/0x8c arch/arm64/mm/fault.c:749 do_mem_abort+0x44/0x94 arch/arm64/mm/fault.c:825 el1_abort+0x40/0x60 arch/arm64/kernel/entry-common.c:367 el1h_64_sync_
CVE-2022-50697
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2022-50697
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "febf018d22347b5df94066bca05d0c11a84e839d",
"lessThan": "98f53e591940e4c3818be358c5dc684d5b30cb56",
"versionType": "git"
},
{
"status": "affected",
"version": "febf018d22347b5df94066bca05d0c11a84e839d",
"lessThan": "aacffc1a8dbf67c5463cb4f67b37143c01ca6fa9",
"versionType": "git"
},
{
"status": "affected",
"version": "febf018d22347b5df94066bca05d0c11a84e839d",
"lessThan": "78d48bc41f7726113c9f114268d3ab11212814da",
"versionType": "git"
},
{
"status": "affected",
"version": "febf018d22347b5df94066bca05d0c11a84e839d",
"lessThan": "aadb1507a77b060c529edfeaf67f803e31461f24",
"versionType": "git"
},
{
"status": "affected",
"version": "febf018d22347b5df94066bca05d0c11a84e839d",
"lessThan": "755eb0879224ffc2a43de724554aeaf0e51e5a64",
"versionType": "git"
},
{
"status": "affected",
"version": "febf018d22347b5df94066bca05d0c11a84e839d",
"lessThan": "5d5a481a7fd0234f617535dc464ea010804a1129",
"versionType": "git"
},
{
"status": "affected",
"version": "febf018d22347b5df94066bca05d0c11a84e839d",
"lessThan": "1a185fe83c2a60c1e3596fb9d82dbeb148dc09c6",
"versionType": "git"
},
{
"status": "affected",
"version": "febf018d22347b5df94066bca05d0c11a84e839d",
"lessThan": "563e45fd5046045cc194af3ba17f5423e1c98170",
"versionType": "git"
},
{
"status": "affected",
"version": "febf018d22347b5df94066bca05d0c11a84e839d",
"lessThan": "ab0377803dafc58f1e22296708c1c28e309414d6",
"versionType": "git"
}
],
"programFiles": [
"include/net/mrp.h",
"net/802/mrp.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.9"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.9",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.9.337",
"versionType": "semver",
"lessThanOrEqual": "4.9.*"
},
{
"status": "unaffected",
"version": "4.14.303",
"versionType": "semver",
"lessThanOrEqual": "4.14.*"
},
{
"status": "unaffected",
"version": "4.19.270",
"versionType": "semver",
"lessThanOrEqual": "4.19.*"
},
{
"status": "unaffected",
"version": "5.4.229",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.163",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.86",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.0.16",
"versionType": "semver",
"lessThanOrEqual": "6.0.*"
},
{
"status": "unaffected",
"version": "6.1.2",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"include/net/mrp.h",
"net/802/mrp.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2022-50697
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30228 · Revision 1
- Added to Heist Feed
- Publisher date