CVE-2022-49846: udf: Fix a slab-out-of-bounds write bug in udf_find_entry()
Noroxi assessment
Priority: Monitor (action score 31/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.24% (FIRST EPSS).
- Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: Linux Linux 03f9582a6a2ebd25a440896475c968428c4b63e7, 583fdd98d94acba1e7225e5cc29063aef0741030, 7a6051d734f1ed0031e2216f9a538621235c11a4.
Low priority for now. Upgrade to Linux Linux 03f9582a6a2ebd25a440896475c968428c4b63e7, 583fdd98d94acba1e7225e5cc29063aef0741030, 7a6051d734f1ed0031e2216f9a538621235c11a4 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
In the Linux kernel, the following vulnerability has been resolved: udf: Fix a slab-out-of-bounds write bug in udf_find_entry() Syzbot reported a slab-out-of-bounds Write bug: loop0: detected capacity change from 0 to 2048 ================================================================== BUG: KASAN: slab-out-of-bounds in udf_find_entry+0x8a5/0x14f0 fs/udf/namei.c:253 Write of size 105 at addr ffff8880123ff896 by task syz-executor323/3610 CPU: 0 PID: 3610 Comm: syz-executor323 Not tainted 6.1.0-rc2-syzkaller-00105-gb229b6ca5abb #0 Hardware name: Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:284 print_report+0x107/0x1f0 mm/kasan/report.c:395 kasan_report+0xcd/0x100 mm/kasan/report.c:495 kasan_check_range+0x2a7/0x2e0 mm/kasan/generic.c:189 memcpy+0x3c/0x60 mm/kasan/shadow.c:66 udf_find_entry+0x8a5/0x14f0 fs/udf/namei.c:253 udf_lookup+0xef/0x340 fs/udf/namei.c:309 lookup_open fs/namei.c:3391 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0x10e6/0x2df0 fs/namei.c:3710 do_filp_open+0x264/0x4f0 fs/namei.c:3740 do_sys_openat2+0x124/0x4e0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_creat fs/open.c:1402 [inline] __se_sys_creat fs/open.c:1396 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1396 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ffab0d164d9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe1a7e6bb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ffab0d164d9 RDX: 00007ffab0d164d9 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 00007ffab0cd5a10 R08: 0000000000000000 R09: 0000000000000000 R10: 00005555573552c0 R11: 0000000000000246 R12: 00007ffab0cd5aa0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> Allocated by task 3610: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x3d/0x60 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:380 kmalloc include/linux/slab.h:576 [inline] udf_find_entry+0x7b6/0x14f0 fs/udf/namei.c:243 udf_lookup+0xef/0x340 fs/udf/namei.c:309 lookup_open fs/namei.c:3391 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0x10e6/0x2df0 fs/namei.c:3710 do_filp_open+0x264/0x4f0 fs/namei.c:3740 do_sys_openat2+0x124/0x4e0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_creat fs/open.c:1402 [inline] __se_sys_creat fs/open.c:1396 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1396 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff8880123ff800 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 150 bytes inside of 256-byte region [ffff8880123ff800, ffff8880123ff900) The buggy address belongs to the physical page: page:ffffea000048ff80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x123fe head:ffffea000048ff80 order:1 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea00004b8500 dead000000000003 ffff888012041b40 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x0(), pid 1, tgid 1 (swapper/0), ts 1841222404, free_ts 0 create_dummy_stack mm/page_owner.c: ---truncated---
- BDU:2025-10254
- ALSA-2025:10379
- ALSA-2025:10669
- ALSA-2025:10670
- RHSA-2025:10379
- RHSA-2025:10669
- RHSA-2025:10670
- RHSA-2025:10671
- RHSA-2025:10673
- RHSA-2025:10675
- RHSA-2025:10701
- RHSA-2025:10761
- RHSA-2025:10828
- RHSA-2025:10829
- RHSA-2025:10830
- RHSA-2025:10834
- RHSA-2025:10974
- RHSA-2025:10976
- RHSA-2025:10977
- RHSA-2025:10978
- Published
- May 1, 2025
- Updated
- Aug 5, 2026
- EPSS
- 0.2% · 15th percentile
- CWE
- CWE-787
Report tools
Action score
31
Monitor
Low priority for now.
- CVSS
- 31 / 40 · 7.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 7.8
- CNA · Linux
- 7.8
- agree
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernel4.6 and later · before 4.9.334
- linux linux kernel4.10 and later · before 4.14.300
- linux linux kernel4.15 and later · before 4.19.267
- linux linux kernel4.20 and later · before 5.4.225
- linux linux kernel5.5 and later · before 5.10.155
- linux linux kernel5.11 and later · before 5.15.79
- linux linux kernel5.16 and later · before 6.0.9
- linux linux kernel6.1
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux
- 4.6affected
- 066b9cded00b8e3212df74a417bb074f3f3a1fe0 and later · before 583fdd98d94acba1e7225e5cc29063aef0741030affected · git
- 066b9cded00b8e3212df74a417bb074f3f3a1fe0 and later · before f1517721c408631f09d54c743aa70cb07fd3eebdaffected · git
- 066b9cded00b8e3212df74a417bb074f3f3a1fe0 and later · before 7a6051d734f1ed0031e2216f9a538621235c11a4affected · git
- 066b9cded00b8e3212df74a417bb074f3f3a1fe0 and later · before d8971f410739a864c537e0ac29344a7b6c450232affected · git
- 066b9cded00b8e3212df74a417bb074f3f3a1fe0 and later · before 03f9582a6a2ebd25a440896475c968428c4b63e7affected · git
- 066b9cded00b8e3212df74a417bb074f3f3a1fe0 and later · before c736ed8541605e3a25075bb1cbf8f38cb3083238affected · git
- 066b9cded00b8e3212df74a417bb074f3f3a1fe0 and later · before ac79001b8e603226fab17240a79cb9ef679d3cd9affected · git
- 066b9cded00b8e3212df74a417bb074f3f3a1fe0 and later · before c8af247de385ce49afabc3bf1cf4fd455c94bfe8affected · git
- before 4.6not affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | bpftool | before 4.18.0-553.60.1.el8_10 | 4.18.0-553.60.1.el8_10 |
| AlmaLinux:8 | kernel | before 4.18.0-553.60.1.el8_10 | 4.18.0-553.60.1.el8_10 |
| AlmaLinux:8 | kernel-abi-stablelists | before 4.18.0-553.60.1.el8_10 | 4.18.0-553.60.1.el8_10 |
| AlmaLinux:8 | kernel-core | before 4.18.0-553.60.1.el8_10 | 4.18.0-553.60.1.el8_10 |
| AlmaLinux:8 | kernel-cross-headers | before 4.18.0-553.60.1.el8_10 | 4.18.0-553.60.1.el8_10 |
| AlmaLinux:8 | kernel-debug | before 4.18.0-553.60.1.el8_10 | 4.18.0-553.60.1.el8_10 |
| AlmaLinux:8 | kernel-debug-core | before 4.18.0-553.60.1.el8_10 | 4.18.0-553.60.1.el8_10 |
| AlmaLinux:8 | kernel-debug-devel | before 4.18.0-553.60.1.el8_10 | 4.18.0-553.60.1.el8_10 |
| AlmaLinux:8 | kernel-debug-modules | before 4.18.0-553.60.1.el8_10 | 4.18.0-553.60.1.el8_10 |
| AlmaLinux:8 | kernel-debug-modules-extra | before 4.18.0-553.60.1.el8_10 | 4.18.0-553.60.1.el8_10 |
| AlmaLinux:8 | kernel-devel | before 4.18.0-553.60.1.el8_10 | 4.18.0-553.60.1.el8_10 |
| AlmaLinux:8 | kernel-doc | before 4.18.0-553.60.1.el8_10 | 4.18.0-553.60.1.el8_10 |
| AlmaLinux:8 | kernel-headers | before 4.18.0-553.60.1.el8_10 | 4.18.0-553.60.1.el8_10 |
| AlmaLinux:8 | kernel-modules | before 4.18.0-553.60.1.el8_10 | 4.18.0-553.60.1.el8_10 |
| AlmaLinux:8 | kernel-modules-extra | before 4.18.0-553.60.1.el8_10 | 4.18.0-553.60.1.el8_10 |
| AlmaLinux:8 | kernel-rt | before 4.18.0-553.60.1.rt7.401.el8_10 | 4.18.0-553.60.1.rt7.401.el8_10 |
| AlmaLinux:8 | kernel-rt-core | before 4.18.0-553.60.1.rt7.401.el8_10 | 4.18.0-553.60.1.rt7.401.el8_10 |
| AlmaLinux:8 | kernel-rt-debug | before 4.18.0-553.60.1.rt7.401.el8_10 | 4.18.0-553.60.1.rt7.401.el8_10 |
| AlmaLinux:8 | kernel-rt-debug-core | before 4.18.0-553.60.1.rt7.401.el8_10 | 4.18.0-553.60.1.rt7.401.el8_10 |
| AlmaLinux:8 | kernel-rt-debug-devel | before 4.18.0-553.60.1.rt7.401.el8_10 | 4.18.0-553.60.1.rt7.401.el8_10 |
| AlmaLinux:8 | kernel-rt-debug-modules | before 4.18.0-553.60.1.rt7.401.el8_10 | 4.18.0-553.60.1.rt7.401.el8_10 |
| AlmaLinux:8 | kernel-rt-debug-modules-extra | before 4.18.0-553.60.1.rt7.401.el8_10 | 4.18.0-553.60.1.rt7.401.el8_10 |
| AlmaLinux:8 | kernel-rt-devel | before 4.18.0-553.60.1.rt7.401.el8_10 | 4.18.0-553.60.1.rt7.401.el8_10 |
| AlmaLinux:8 | kernel-rt-modules | before 4.18.0-553.60.1.rt7.401.el8_10 | 4.18.0-553.60.1.rt7.401.el8_10 |
+96
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV90Now
- CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
Published before and after this one in the same product
- ← EarlierCVE-2022-49844May 1, 2025 · can: dev: fix skb drop check28Monitor
- ← EarlierCVE-2022-49845May 1, 2025 · can: j1939: j1939_send_one(): fix missing CAN header initialization22Monitor
- Later →CVE-2022-49847May 1, 2025 · net: ethernet: ti: am65-cpsw: Fix segmentation fault at module unload22Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 03f9582a6a2ebd25a440896475c968428c4b63e7 | Vendor (CNA) |
| Linux Linux | 583fdd98d94acba1e7225e5cc29063aef0741030 | Vendor (CNA) |
| Linux Linux | 7a6051d734f1ed0031e2216f9a538621235c11a4 | Vendor (CNA) |
| Linux Linux | ac79001b8e603226fab17240a79cb9ef679d3cd9 | Vendor (CNA) |
| Linux Linux | c736ed8541605e3a25075bb1cbf8f38cb3083238 | Vendor (CNA) |
| Linux Linux | c8af247de385ce49afabc3bf1cf4fd455c94bfe8 | Vendor (CNA) |
| Linux Linux | d8971f410739a864c537e0ac29344a7b6c450232 | Vendor (CNA) |
| Linux Linux | f1517721c408631f09d54c743aa70cb07fd3eebd | Vendor (CNA) |
| almalinux:kernel | 5.14.0-570.25.1.el9_6 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k | 5.14.0-570.25.1.el9_6 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-core | 5.14.0-570.25.1.el9_6 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug | 5.14.0-570.25.1.el9_6 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-core | 5.14.0-570.25.1.el9_6 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-devel | 5.14.0-570.25.1.el9_6 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-devel-matched | 5.14.0-570.25.1.el9_6 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-modules | 5.14.0-570.25.1.el9_6 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-modules-core | 5.14.0-570.25.1.el9_6 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-debug-modules-extra | 5.14.0-570.25.1.el9_6 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-devel | 5.14.0-570.25.1.el9_6 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-64k-devel-matched | 5.14.0-570.25.1.el9_6 · AlmaLinux:9 | Package registry (OSV) |
| debian:linux | 6.0.10-1 · Debian:12 | Package registry (OSV) |
| red hat:kernel-64k-debug-debuginfo | 0:5.14.0-570.25.1.el9_6 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-debug-devel | 0:5.14.0-570.25.1.el9_6 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-debug-devel-matched | 0:5.14.0-570.25.1.el9_6 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-debuginfo | 0:5.14.0-570.25.1.el9_6 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-devel | 0:5.14.0-570.25.1.el9_6 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-64k-devel-matched | 0:5.14.0-570.25.1.el9_6 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-debug-debuginfo | 0:5.14.0-570.25.1.el9_6 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-debug-devel | 0:5.14.0-570.25.1.el9_6 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:kernel-debug-devel-matched | 0:5.14.0-570.25.1.el9_6 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
+4
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-787 · Out-of-bounds WriteCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (7 more)Show less
- git.kernel.org/stable/c/583fdd98d94acba1e7225e5cc29063aef0741030
- git.kernel.org/stable/c/7a6051d734f1ed0031e2216f9a538621235c11a4
- git.kernel.org/stable/c/ac79001b8e603226fab17240a79cb9ef679d3cd9
- git.kernel.org/stable/c/c736ed8541605e3a25075bb1cbf8f38cb3083238
- git.kernel.org/stable/c/c8af247de385ce49afabc3bf1cf4fd455c94bfe8
- git.kernel.org/stable/c/d8971f410739a864c537e0ac29344a7b6c450232
- git.kernel.org/stable/c/f1517721c408631f09d54c743aa70cb07fd3eebd
Vendor advisories and official records. Exploit/PoC links are deliberately left out.