CVE-2022-49803
netdevsim: Fix memory leak of nsim_dev->fa_cookie
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: netdevsim: Fix memory leak of nsim_dev->fa_cookie kmemleak reports this issue: unreferenced object 0xffff8881bac872d0 (size 8): comm "sh", pid 58603, jiffies 4481524462 (age 68.065s) hex dump (first 8 bytes): 04 00 00 00 de ad be ef ........ backtrace: [<00000000c80b8577>] __kmalloc+0x49/0x150 [<000000005292b8c6>] nsim_dev_trap_fa_cookie_write+0xc1/0x210 [netdevsim] [<0000000093d78e77>] full_proxy_write+0xf3/0x180 [<000000005a662c16>] vfs_write+0x1c5/0xaf0 [<000000007aabf84a>] ksys_write+0xed/0x1c0 [<000000005f1d2e47>] do_syscall_64+0x3b/0x90 [<000000006001c6ec>] entry_SYSCALL_64_after_hwframe+0x63/0xcd The issue occurs in the following scenarios: nsim_dev_trap_fa_cookie_write() kmalloc() fa_cookie nsim_dev->fa_cookie = fa_cookie .. nsim_drv_remove() The fa_cookie allocked in nsim_dev_trap_fa_cookie_write() is not freed. To fix, add kfree(nsim_dev->fa_cookie) to nsim_drv_remove().
Timeline
ID reserved
By Linux
Published
- 18 months later
· 18 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.20% · top 90% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected d3cbb907ae57fe5da314b51d949b617b538bdeae – < 7d79725a7073d86b9185f87718e22f3d65115801
- affected d3cbb907ae57fe5da314b51d949b617b538bdeae – < 6d463ddd0107d4188229d996dcdd45c99bad8af7
- affected d3cbb907ae57fe5da314b51d949b617b538bdeae – < 207edad5717e0a5709ce8467f0eff41c607835c9
- affected d3cbb907ae57fe5da314b51d949b617b538bdeae – < 064bc7312bd09a48798418663090be0c776183db
- affected 5.7
- unaffected < 5.7
- unaffected 5.10.260 – ≤ 5.10.*
- unaffected 5.15.209 – ≤ 5.15.*
- unaffected 6.0.10 – ≤ 6.0.*
- unaffected 6.1 – ≤ *
References (4)
- https://git.kernel.org/stable/c/7d79725a7073d86b9185f87718e22f3d65115801 (opens in a new tab)
- https://git.kernel.org/stable/c/6d463ddd0107d4188229d996dcdd45c99bad8af7 (opens in a new tab)
- https://git.kernel.org/stable/c/207edad5717e0a5709ce8467f0eff41c607835c9 (opens in a new tab)
- https://git.kernel.org/stable/c/064bc7312bd09a48798418663090be0c776183db (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-49803)Record last updated .