Answer in brief
CVE-2023-53189 records a High severity (CVSS 7.8) vulnerability in ipv6/addrconf: fix a potential refcount underflow for idev. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2023-53189 records a High severity (CVSS 7.8) vulnerability in ipv6/addrconf: fix a potential refcount underflow for idev. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=b7b1bfce0bb68bd8f6e62a28295922785cc63781 <c6395e32935d35e6f935e7caf1c2dac5a95943b4 || >=b7b1bfce0bb68bd8f6e62a28295922785cc63781 <df62fdcd004afa72ecbed0e862ebb983acd3aa57 || >=b7b1bfce0bb68bd8f6e62a28295922785cc63781 <c7eeba47058532f6077d6a658e38b6698f6ae71a || >=b7b1bfce0bb68bd8f6e62a28295922785cc63781 <2ad31ce40e8182860b631e37209e93e543790b7c || >=b7b1bfce0bb68bd8f6e62a28295922785cc63781 <82abd1c37d3bf2a2658b34772c17a25a6f9cca42 || >=b7b1bfce0bb68bd8f6e62a28295922785cc63781 <436b7cc7eae7851c184b671ed7a4a64c750b86f7 || >=b7b1bfce0bb68bd8f6e62a28295922785cc63781 <1f656e483eb4733d62f18dfb206a49b78f60f495 || >=b7b1bfce0bb68bd8f6e62a28295922785cc63781 <06a0716949c22e2aefb648526580671197151acc || 973d5956f754cfc306f5e274d71503498f4b0324 || >=3.10.105 <3.11 | c6395e32935d35e6f935e7caf1c2dac5a95943b4, df62fdcd004afa72ecbed0e862ebb983acd3aa57, c7eeba47058532f6077d6a658e38b6698f6ae71a, 2ad31ce40e8182860b631e37209e93e543790b7c, 82abd1c37d3bf2a2658b34772c17a25a6f9cca42, 436b7cc7eae7851c184b671ed7a4a64c750b86f7, 1f656e483eb4733d62f18dfb206a49b78f60f495, 06a0716949c22e2aefb648526580671197151acc, 3.11 |
| Linux/Linuxgeneric | 3.11 | Not reported |
Published upstream
Sep 15, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: ipv6/addrconf: fix a potential refcount underflow for idev Now in addrconf_mod_rs_timer(), reference idev depends on whether rs_timer is not pending. Then modify rs_timer timeout. There is a time gap in [1], during which if the pending rs_timer becomes not pending. It will miss to hold idev, but the rs_timer is activated. Thus rs_timer callback function addrconf_rs_timer() will be executed and put idev later without holding idev. A refcount underflow issue for idev can be caused by this. if (!timer_pending(&idev->rs_timer)) in6_dev_hold(idev); <--------------[1] mod_timer(&idev->rs_timer, jiffies + when); To fix the issue, hold idev if mod_timer() return 0.
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=b7b1bfce0bb68bd8f6e62a28295922785cc63781 <c6395e32935d35e6f935e7caf1c2dac5a95943b4 || >=b7b1bfce0bb68bd8f6e62a28295922785cc63781 <df62fdcd004afa72ecbed0e862ebb983acd3aa57 || >=b7b1bfce0bb68bd8f6e62a28295922785cc63781 <c7eeba47058532f6077d6a658e38b6698f6ae71a || >=b7b1bfce0bb68bd8f6e62a28295922785cc63781 <2ad31ce40e8182860b631e37209e93e543790b7c || >=b7b1bfce0bb68bd8f6e62a28295922785cc63781 <82abd1c37d3bf2a2658b34772c17a25a6f9cca42 || >=b7b1bfce0bb68bd8f6e62a28295922785cc63781 <436b7cc7eae7851c184b671ed7a4a64c750b86f7 || >=b7b1bfce0bb68bd8f6e62a28295922785cc63781 <1f656e483eb4733d62f18dfb206a49b78f60f495 || >=b7b1bfce0bb68bd8f6e62a28295922785cc63781 <06a0716949c22e2aefb648526580671197151acc || 973d5956f754cfc306f5e274d71503498f4b0324 || >=3.10.105 <3.11 | c6395e32935d35e6f935e7caf1c2dac5a95943b4, df62fdcd004afa72ecbed0e862ebb983acd3aa57, c7eeba47058532f6077d6a658e38b6698f6ae71a, 2ad31ce40e8182860b631e37209e93e543790b7c, 82abd1c37d3bf2a2658b34772c17a25a6f9cca42, 436b7cc7eae7851c184b671ed7a4a64c750b86f7, 1f656e483eb4733d62f18dfb206a49b78f60f495, 06a0716949c22e2aefb648526580671197151acc, 3.11 |
| Linux/Linuxgeneric | 3.11 | Not reported |
Published upstream
Sep 15, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: ipv6/addrconf: fix a potential refcount underflow for idev Now in addrconf_mod_rs_timer(), reference idev depends on whether rs_timer is not pending. Then modify rs_timer timeout. There is a time gap in [1], during which if the pending rs_timer becomes not pending. It will miss to hold idev, but the rs_timer is activated. Thus rs_timer callback function addrconf_rs_timer() will be executed and put idev later without holding idev. A refcount underflow issue for idev can be caused by this. if (!timer_pending(&idev->rs_timer)) in6_dev_hold(idev); <--------------[1] mod_timer(&idev->rs_timer, jiffies + when); To fix the issue, hold idev if mod_timer() return 0.
Quoted source text, attributed separately from HOL analysis.